You may have Microscopic Colitis. The only way for your GI specialist to diagnose this monster is through a BIOPSY. I had severe explosive diarrhea, bloating, nause, and fatigue. It's easy to do when you have a colonoscopy. The only way to treat safely is through DIET! This disease is treated like the Red Headed Step Child of inflammatory bowel diseases and doctors don't know what to do.