For the past few months, I have had this spasm/tingling sensation on my left side abdomen that goes from front to back…Also at times, feels like there is something moving around inside me, just at or below the rib cage on the left side. I have had changes in bowel movements - sometimes difficult like passing rocks, other times, diarrhea like. My family Dr did an abdominal ultrasound and ob/gyn did a pelvic u/s but said there was nothing abnormal-looking on them. I called my gastroenterologist but they cannot see me until January…any ideas on what might be causing this?