The title summarizes the problem. My school doctor diagnosed me with IBS, and I'm quite skeptical as I've had pain without diarrhea or constipation. The most troubling pain is the almost paralyzing pain in my lower abdomen 5-15 minutes before passing a stool that occurs almost randomly once every few weeks, but sometimes more frequently (such as twice in the past week). I've been trying to correlate this to the size/hardness of my stools, but it doesn't seem to follow a trend. My stools are anywhere from normal to quite hard, and can be quite large from time to time (large enough to cause rectal bleeding due to tearing), or also very narrow. This is despite what I consider to be a normal diet (with fiber supplement) and sufficient water intake. There are times when I become constipated, normally after passing a large stool, which is probably an innate reaction to the pain. One time, in fact, I ejaculated a little bit upon passing a stool. That too was somewhat troubling. Any insight or advice is greatly appreciated as to what may be causing my problems. Almost forgot... I've had a consistent pain to the left of my belly button that ranges from a dull pain to the feeling of a slight muscle tear, but no hernia or sports injury there. It feels to be relatively internal, and it will feel uncomfortable to push on the area when at its worst.