Earlier quoted context omitted.
What you describe is a common symptom of celiac disease. Did you get tested?
And just to add to that, the blood test can be unreliable. A stomach biopsy is the best way to verify the condition.
I nearly died on that shit (Gluten). My life would have been very different if it hat been picked up in my teens. In the end I figured it out myself when I was basically dying (they looked at me when I waked into the hospital and said: Mate, sorry to tell you but the first thing we have to do is an HIV Test. This may give you an idea how I looked.) I know my form of intolerance is rare (1:10.000 to 1:100.000).
My life is different now. I feel better than ever.