Salofalk and salicylic-nsaid allergy

Hi

I was diagnosed with the ulcerative colitis yesterday. Today I got medicines (slaofalk drug and salofalk foam) in accordance with the receipt.After that i noticed a coution note on prospectus that was about salicylic (aspirin) allergy.The problem is  I'm allergic to aspirin and nsaids.I talked to the doctor about this problem.He said that i had to try!  if it goes wrong, go to the emergency.. but i couldn't.. What must i do? please help me   (sorry for my english)

Thank you for your response :)

I have itchy, watery eyes, congestion, difficulty breathing when i take a 100 mg aspirin. I supposed to take 500mg x2 daily and foam one time a day.I don't know what will happen when i take these dosages.I am so scared :(

Thank you..