For the past few days now, whenever I have a BM, there is a pinching/scratching pain on the left side of my abdomen, right underneath my ribcage and also to the immediate left of my belly button. My stools are also very small and I have a lot of gas before and after I have a BM. This hasn't ever happened before, and I wonder if someone could give me a heads up as to what it is (if it is, in fact, something) or if my IBS is just changing around a bit. Keep in mind, I just finished 5 or 6 days of taking Rifaximin and the anti-depressant Ativan (the latter made me nauseous nearly all day). My sleep habits are the same and my diet has grown, so I really have no idea why there's less stool and not more.Thanks.