I'm one of those "allergic to everything" people and I have asthma too. Some perfumes give me headaches, but the worst ones give me a rash (Bath & Body works I'm looking at you...)
You'd probably be better off figuring out which ingredients cause which symptoms and go from there. "Hypoallergenic" doesn't mean nobody will have a reaction or that one isn't possible. Clean ingredients don't mean you won't have a reaction either. Everyone is different.
So it's time to start a log of the perfume you wear and the reaction. Then you could find the ingredients and try to narrow down the offenders.

Juliette Has a Gun’s Not a Perfume is genuinely hypoallergenic. In fact, it’s an aspect of the (not technically a) fragrance that they promote!

Might be synthetics you’re reacting to. All natural, vegan worth trying to see if that has a different impact. Even most alcohol used in perfumes has synthetics ( all natural perfumers alcohol is very pricey).

I have sensitivity to many scents--it's been trial and error to determine which ones I can tolerate (and it's not an exact science). But for sure: the simpler the scent, the better I can manage it. I also do better with fruits and soliflores. Yet: there are also days I can tolerate Poison! So I would look for the simplest perfume you can find, with really basic notes and no musk, patchouli, oakmoss, sandalwood, or amber. I'd also stay away from anything called "cashmere."

I would try the brand Skylar!

Technically NOTHING is 100% hypoallergenic (pretty much ANYTHING can be an allergy trigger for someone, even if it's uncommon) but they aim to be as hypoallergenic as possible, and I've personally never had a sensitivity to any of their perfumes.

Vanilla Sky or Boardwalk Delight might be good scents to try if you like gourmands!

That’s a pretty vague term. What are you allergic to specifically?

Not A Perfume by Juliette Has a Gun is the only one I can think of off the top of my head. It’s just alcohol, cetalox, and water AFAIK which means it doesn’t contain any of the ingredients people are usually allergic to in perfumes.

If you’re looking for something with a strong/perfumey smell you’re probably out of luck. All the nice smelling things are allergens

You could try Skylar. They exclude a ton of different ingredients that are supposed to be allergenic. Unfortunately, it’s just gonna be trial and error though because nothing that has fragrance can ever be truly hypoallergenic.

The only way to know that unfortunately is trial and error.

I do not think these exist in the way you are looking for.

I really like the oils from Ambre — Solace is my favorite. That one’s the only perfume oil I use amongst my pretty expansive collection of perfumes. I am allergic to all kinds of things, so I’m never really sure what the culprit is when I’m struggling, but I feel like the Ambre never exacerbates, triggers, or worsens my issues.

Cara, depende de quem usa. O que dá alergia em um, não dá alergia em outro.

Não tem como te dar uma resposta, você precisa identificar as substâncias que te causam alergia para tentar selecionar as fragrâncias.

The top note in By the Fireplace makes me sneeze!

I get this with certain florals, like gardenia and lily.

Tocca's Cleopatra, Stella and to a lesser extent Florence. It is probably some molecule that they use for the white florals that just creates a headache for me.

Same for JHAG Not A Perfume.

Going through trying to see if anyone else had an allergic reaction. I tried another 13 today for the first time and I had a severe splotchy histamine response and it looked like a sunburn for hours 🥲

I'm normally not too sensitive to perfumes or prone to headaches at all but there is something about the Clean Reserve line that makes my nose and head hurt (despite liking the scents).

I just posted above—I am allergic to any scents that contain citrus— and all of the compounds you listed except for farnesol are found in citrus. I asked the same thing—what are safe scents?

“Natural fragrance “ doesn’t do it—these all naturally occur and are used in many essential oil blends.

I have issues with fragrance too. I feel like that's just life with allergies.

Also allergic to fragrances. Lurking for answers 👀

Or try some nice aromatic essential oil. I also cannot stand perfumes. I sometimes use a special mix of essential oils called "heart warming". Smells a lot like roses and I think sandle wood and I love it. I put it on my wrists and behind my ears. Its also less expensive than perfume. Just check that it is 100% essential and therefor natural.

I think your best bet is to find single ingredient essential oils you are not allergic to and wear those!

I second Skylar! Also Juliette Has A Gun Not A Perfume is hypoallergenic

orebella by bella hadid is made with no alcohol, vegan ingredients that might be suitable for hypoallergenic skin. i’m not sure if this one is sold is europe, though!

clean reserve is one of the most popular “clean” perfume brands that she might be interested in. i believe they can be found in europe but i could be wrong, sorry haha

The perfume house Skylar makes hypoallergenic perfumes. Highly recommend them

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As well as the advice above, I would recommend not bringing a fragrance to your nose immediately while it’s freshly sprayed, either just smell the atomiser or let a paper strip dry before you sniff it. That’s helped me narrow fragrance down a bit better. I discovered that aldehydes will always make my sinuses ache. My allergies are not severe though so I appreciate my suggestion may not work for everyone.

Plenty of natural substances are irritating and cause allergies, so that's not a safe way to guess. 

Trial and error, really. We all have different triggers.

Juliette Has a Gun Not a Perfume works well for me when when my sinuses are acting up!

If your reaction is to the scent, you could try spraying the back of your neck or generally behind you. This might help you not smell it much but other people still will.

I have a ton of fragrance sensitivities and it was helpful for me to figure out what notes specifically set them off. I found that a lot of the worst offenders for me were white florals.

Before doing that, I stuck to Juliette Has a Gun’s Not a Perfume because it was formulated to be hypoallergenic. It only has one aromachemical in it. Luckily I also love the smell of it so that was my signature scent until I found out I could safely wear fruit, musk, and amber fragrances as well.

Davidoff Cool Water (for men) it somehow always fits. It's refreshing, uplifting but not sweet, and so cheap. I don't know why, but sometimes I simply don't feel like using expensive perfumes, Cool Water always goes.

Jo Malone Wood Sage and Sea Salt. Not great for sillage or longevity, but easily my go-to scent!

D&G Light Blue

Fresh, inoffensive and light but great longevity and sillage. Great compliment getter too

glossier you. it's so versatile.

My safe fragrance is a cheapie! Bath & Body Works Moonlight Path. Even when I don't feel like wearing anything, or right before bed, I'll spray this on and it just adds a little umph to my day.

Heretic Parfum does all naturally derived ingredients in their scents. I would also recommend that you check out some oil based perfumes. They wear a little closer to the skin, but as someone who can be sensitive to scent I find that oil formats are far less triggering than a traditional alcohol based spray; even oils that use synthetic fragrance molecules. Off the top of my head, I know that Solstice Scents and Possets have some perfume oils that are 100% botanical. Another botanical perfume house is Strange Invisible. Hope you find something you love!

Here are some of the ones I’ve been admiring, but haven’t tried because I react to pretty much everything now (the only perfume I use is very faint): Olo Fragrance (uses minimal synthetic ingredients, mostly natural), Illuminated Perfume, Hima Jomo, Tamara Parfums

I LOVE Kumba Made fragrance oils. The Water Lilly has been my go-to for years. I feel like it lasts a really long time, but I don’t wear it every day. https://kuumbamade.com/products/water-lily-fragrance-oil

You could try samples from online shops like Integrity Botanicals and Detox Market. There are lots of small perfumers now, too, that have some natural fragrances - La Curie for example. I’ve seen others but can’t recall their names now - Google searches could possibly find them. That said, many people have the same reaction you have when they’re near someone wearing strong perfume, whether it’s natural or not. I get migraines from all of them and I struggle when I’m in enclosed spaces with someone wearing them. It’s better to keep your perfume close to you and not obvious to others in public if you’ll be in enclosed spaces or close to people who can’t move away (like standing in line).

I found that Pacifica didn't last long enough for me :( but DIME looks amazing! I'm gonna go check them out.

Heretic Parfum, Wit & West, Living Libations, Providence Perfume, there's so many 100% natural perfumers now! Full list is here https://organicbeautylover.com/skin/best-clean-perfumes/