Well you have pretty much described what I went through. i had allergy testing done, extensive bloodwork, xrays and then they wanted to do cat scans. i didnt do the CAT scans..i knew it was something related to my eating..not in my head.
I tested negative on food allergies also…which shocked me. thats when i started searching the internet. i just knew i had food allergies. but i dont and i can tell its from foods i am eating..but not allergies. Blood tests are less accurate than skin testing but none of them are 100% accurate. more like 40-70% at most.
if that makes sense to you.
your symptoms are very close to mine..so it sounds like candida to me.