J.L.
Google Oral Allergy Syndrome and you will find that people often do develop allergies to certain foods usually in the raw or uncooked form only. Cooking the foods seems to do something to the plant enzymes so they don't cause any reactions. There is a cross connection between certain foods and certain pollens, so if you suffer from seasonal outdoor allergies, it is likely this syndrome. I thought my children were making it up to get out of eating certain fruits and vegetables! They complained of the same thing happening with raw carrots, bananas and watermelon. They both suffer with spring outdoor allergies, one since she was 3 and the other developed them about 3 years ago. They are 10 and 12 now and ate those foods without problems before the outdoor allergies kicked in.
I would recommend a trip to an allergist who can do the scratch tests to see how highly allergic you are to the items. Try eating them cooked and see if you get a reaction. Hope this helps!
J.