I have been having cramps for 3 weeks. I had cramps 2 weeks before my period then period with cramps. I just finished my period & still cramps on my left side. The cramps are under my rib cage and above my hip. I bleed for 7 days first light then heavy. The beginning of January I saw my gynecologist and had a well women' s exam& she found nothing abnormal. I take ibuprofen for the pain. What do you think this could be?