You can perform your own food allergy test by yourself.
Paint a little bit of the food you want to test on the wrist where the skin is soft before you go to bed. Make sure that the painted food is dry enough so that it does not wipe off while you are sleeping.
Check the skin in your morning. If it turned pink or red, then you may be allergic to the food. If there is no change on the skin, you may not be allergic.