I think this is something you need to discuss with your health care provider, since it's quite difficult to tell the exact nature of your complaint from afar. It could be that this is nothing to worry about, and your discomfort is only the stretching of the uterus, but it could be that you are feeling early symptoms of preterm labor, and that is not a good thing several months before your due date. Go see your provider and explain exactly what you are feeling and where you are feeling it, and I bet your provider will examine you and be able to tell the nature of your complaint.
