I've forgotten already, have you tried eliminating gluten entirely from your diet for a while, just to see? I think I remember you saying that tests have been done that claimed you weren't a glutie, but the gluten tests are notoriously faulty.
I've probbbbbably mentioned this to you before but my anti-gluten symptoms fit only TWO of the symptoms listed anywhere on the internets. However, I'm extremely sensitive to it - last night I had my first 'episode' in quite a while...from having someone touch their gluten-y butter knife to some of my GF bread without my knowledge. It was just that simple and I was in the bathroom all night [me and you!! Haha
And, after going gluten free, things started changing about my body that I had absolutely no idea were actually issues - my feet that used to look like squares with toes attached suddenly look like feet, I lost a ton of weight, my lady-time cramps all but disappeared, and on...weird stuff!
Anyway, it only took a week of mostly zero gluten [I ate things that had "hidden" gluten in them, being a no0b to GF] for me to feel like a miracle had taken place in my body. And after feeling that way, there was NO way I was going back to gluten! Haha
Also, I'm really sorry your dr is a jerk.
I know how that goes. My MD thought I was making it alllll up when I told him about my issues. He literally said "well, some people are like that!"
Um, yeah. Maybe so but I sure as heck don't have to live like that!! And then I went GF. Haha
Praying for you, dear. <3