Welcome to the board
Have you had food allergy testing done?
Which growing up I had allot of stomach problems & no doctor could tell us why. As a teen I started getting rashes. My mom told me then that as a baby the wheat in baby food would give me rashes. But I grew out of it... She felt bad because she didn't think about that with all the stomach issues. We found that i was gine with white/bleached flour. I stayed away from all wheat starch & wheat gluten & didn't get rashes. But there were a few times i would eat stuff I didn't know had those kind of wheat in them (Pringles, sour dough, soy sauce, ect). I wouldn't get a rash, my allergy had progressed into severe stomach pain. The last couple times it was severe stomach pain, vomiting ect. Like I had the worst kind of flu. I didn't know till I was 30 that I'm only allergic to wheat starch, not wheat gluten. But it took a long time to pin point which one it was because I stayed away from both afraid to test it out. It's been 11 years such I've had wheat starch & I assume it would probably kill me now...
With having problems for so many years, I went gluten free for 3 months one time & 6 months another time. I did not notice any difference in how I felt. I've been tested for celiac.
Anyhow, to my point... Food allergy testing is a good idea. Also keeping a food diary to see if there is a pattern in the foods you are eating. It could take 20 mins after eating to have a reaction.
Also, I know of a few people who had to have their gall bladder out. They had severe stomach pain. One of them had problems for 2 years before finally getting help... I had to have mine out but my pain was in my back, shoulders, & chest. The pain was almost as bad as child birth. I compare my stomach pain from wheat starch the same way... Very Painful...
Anyhow, hope it helps... Wish I had more info for you buy one step at a time is good also