Ive Had A Stomach Issue Going On Now For 5

ive had a stomach issue going on now for 5 yrs. doctors here cant seem to find whats wrong with me. I have cramping, puking, constant bowel movement, sweating, pain. It comes on right away with no notice. ill be fine one minute then bad the next. I got diagnosed with h pylori a couple yrs ago and seems its getting worse. Cant eat chicken either. Tried many different meds but nothing seems to be working. whats my problem.