I have been gluten free for roughly two years but still have major bowel problems?

Hello. I traveled to India in September 2014 and fell really ill with bad bouts of diarrhea and intestinal problems. This continued when I returned to the UK. I have been gluten free for roughly two years in order to help with my bowel problems. This has made me feel better most of the time. However even when following a strict gluten free diet I am still getting bad symptoms. It has got to the stage where I’m scared to eat any food in fear of consequences. I have lost weight and the constant poor health is affecting me mentally and making me feel depressed. Please help