Your pain may feel like it's coming from the womb or any other of your internal reproductive organs. This would mean you would experience the pain in the middle of the lower belly, just above the line of public hair about as far up as the navel. There might be more pain to one side than the other - usually an indication of an ovary being inflamed etc. If you have pain when you have sex, you would feel that deep in your pelvic area. The possible range of conditions is varied. You could be looking at pelvic inflammatory disease, ovarian cysts, fibroids or maybe even endometriosis. In any event, don't wait call your doctor immediately. lower abdominal pain