as a kid iwas able to take aspirin, as i turned into adolescence i became anaphylactic to it and ibuprofen

HEYYY.I DONT REALLY KNOW D ANSWER 2 UR PROBLEM BT STAY AWAY 4M ASPIRIN ITS REALLY DANGEROUS..ITS BANNED ALL OVER D WORLD

Allergies r an overactive immune response. Why people develop allergies is something of a mystery, but u have to have a prior exposure to become immune to something, so it is expected that u would have had no problems in childhood but developed the allergy later. If it is going to happen, it has to happen sometime. And as you've found, when people develop an aspirin allergy, they often cross-react to all NSAID's. And we have not even touched on the syndrome of aspirin sensitivity/asthma/nasal polyps. You do not have that, do you?

Hi!
It is hard to understand allergic reactions.
I have a family member with a similar problem. She developed allergy towards aspirin apparently out of the blue at 40. She cannot take a single drop because she'd go into anaphilactic shock (and this is a person that took aspirin normally before this specific day).
Later, her reaction was diagnosed as allergy to NSAID (Non-Estheroid Anti Inflamatories Drugs) but a few years after she started developing sensibility to Ibuprofen & other fever/flu medications.
It is a rollercoaster really. She is like the 0.0001% of the people that develops this & the doctors do not seem to know anything.
She has learned to live with it, though. Relaxation makes up for a big part. Not being able to take a certain medication when you're not feeling ok requires putting a lot of ur brain in healing yourself.
There seems not to be a real explanation for it, or for what triggered the reactions. I can tell u that we've noticed that on periods with emotional situations, the allergy stresses. If the person is sad, blue, or even very very mad. A tranquil environment is a key in helping an allergic person gaining control.

What I can say is: know yourself. You should have a physician u trust & u should definitely pay attention to what he/she says. However: try to understand ur body yourself too, because not even a doctor is going to be able to do it better than you.
Try to write down every time u have a reaction, & write what u were doing that day, what u felt, what u ate, what happened. You will be able to create theories & see patterns. Know them & learn from them, regardless of what the Doctors may say (we had a Doctor that say that people Allergic to NSAID do not develop allergies toward acetaminophen, & that actually send my family member acetaminophen for a fever. u can imagine what happened. We had doctors that have also said -in the beggining- that allergies r NOT developed at age 40. *sigh* They both recognized their mistakes a long time after.)

Trust yourself! And learn about yourself, & do have a professional to go to :)

Goodluck!

EDIT: The second allergy developed for my family member was towards acetaminophen & its derivates. Ibuprophen is also a NSAID, if u have an allergy to aspirin & NSAIDs it is logic u wo not be able to have ibuprophen ;)

Goodluck!