Your pencil thin bm remind me exactly what I have suffered though for the last 3+ years. I'd wake up in horrible pain and be in and out of the bathroom so often I was wishing I could die. I have been taking some otc, meds that have helped some. If I had eaten anything like pickles that would have torn my stomach up more. I haven't touched any more antibiotics in 3 years. A colonoscopy shouldn't cause you to lose your good bacteria. Only the use of antibiotics will do that. I have been though every horrible and nightmarish test they have and NOTHING showed up. Here is my theory, the over use of antibiotics has causes damage to my intestines and other parts internally. The pharmacy companies have never done any real testing on what happens when a person is subjected to over use of them. Therefore no one knows what happens as a result or knows what to look for on any test. if the pharmaceutical companies did any testing they would have the snot suit out of them. Therefore they will never do any research on people that have been overdosed and overprescribed antibiotics.