I know I have IBS and I know the symptoms, but I just can't seem to shake that I have an infection. I haven't been right for the past week. I made an appt. with my PCP, and he said I had diverticulitis. I know I don't have diverticulitis because I had a colonoscopy a month ago and nothing showed up. He did, however, prescribe me with ampicillin, which will help if I do have an infection. He didn't take a stool sample or blood, which I wish he would have so we really know what's going on! I'm still waiting to here back from the GI doctor to see what he says. Anyone had a bacterial infection of the intestines? I haven't been vomiting and no fever, just bowels aren't normal. Please help!!!