question: Hey my name is Katie. I was working out this afternoon about 5 hours ago. Well about three hours ago I was sitting on my couch and my left side starting have sharp pain under my left rib at the bottom. Well I took a Tylenol about an hour ago and it is not working. It is to the point I feel like crying. If I walk to long, sitting long, lean to my right, lay on my left side it hurts extremely bad.