I had severe colitis, due to dehydration, four years ago and since have had severe stomach issues (severe belching, diarrhea, stomach pain and exhaustion) especially during the summer heat. I have never had a clear diagnosis, but my GI doctor first treated it as SIBO, and I followed that diet. When it did not subside, I took xifaxan which worked fairly well over three summers. This past summer, xifaxan was not helping and my Dr. suggests the problem may be fungal yeast overgrowth. Two courses of fluconazole has worked well and I am currently taking nystatin in order to stay well. I have studied, and follow, the FODMAP diet (Monash University) which seems to work fairly well except when the symptoms return.