Do see a dr and maybe a gi dr. It could also be the small intestine. My pain was in the lower right side. It was chrons, but that does not make yours this. However, you should get it checked out.
Have you seen a doc about this? You may be dealing with one of many issues, like something with your appendix or your large intestine. Unfortunately pain alone is not enough of a lead, but it is enough to know that it's not normal, and you should get this checked out.