log the foods you are eating and symptoms and see if there is a correlation. My husband can go to a restaurant and if they put corn starch in the sauce (over fish, for example...vesuvio..), he will be running to the bathroom. I would eat steak and be bent over, turning white, at the table. Certain foods would stick in my gut and not move; thus causing unbearable cramps. I would have to do belly rubs to get over them. Works like a charm, but takes a while to get accustomed to. I found digestive enzymes help with eating. Of course, eating healthy foods and drinks (no diet drinks, sodas, etc>) made a huge diference in health. Feel better!
Docs can be trying! I had mine tell me all I had to do was eat a sandwich (for fiber) and that would fix the Crohns! ...and the planet on which he lives? Sometimes you have to search for the right doc...good luck!