After being misdiagnosed with ulcerative colitis I was diagnosed with IBS. I will go a few days and be fine and then in one day my entire colon empties. I have also been experiencing back pain recently in the kidney area. I have kidney stones so I went to my urologist. After a CT scan he said my large intestines were full and my small intestines were empty thus causing the pain. I am an elementary school teacher and on my bad days it is very disruptive. I tried probiotics but they seemed to make it worse. I take hyoscyamine for diarrhea symptoms. HELP......View Thread