In the current scenario, you need a physical examination by a specialist. The scar needs to be checked for its intactness, any herniation is excluded and a pelvic examination and a pelvic/trans-vaginal sonogram performed to locate the cause of the persistent pain. Pelvic inflammation, ovarian cysts, scar induration etc. are some of the possible causes. Urinalysis
and blood counts also may be needed. Further management can be planned after a complete evaluation of your condition. Hope this helps.