Every month for the past 6 months, 2 weeks after my period, i have a lot of pain in my lower abdomen, it gets hard to pee. it lasts about 2-3 days. why?

? endometriosis: Endometriosis is a female health disorder that occurs when cells from the lining of the uterus grow in other areas of the body. This can lead to pain, irregular bleeding and other symptoms. The pain usually occurs during or just before menstruation and lessens after menstruation. Some women experience cramping during intercourse, and or/pain during bowel movement, and/or urination. See your gyne.