Hello! Thank you for the query. Your symptoms are very characteristic for endometriosis. This condition is caused by appearance uterus cells (so called endometrium) outside the uterus, in your case in abdominal cavity. Such disease can be caused by C-section during which cells from inside the uterus are taken to the abdominal cavity. It gives pelvic pain, pain during intercourse, irregular bleedings and many others. This symptoms very often are getting worse during bleeding time. Endometriosis can also cause adhesions in abdominal cavity what leads to bloats, constipations and many others symptoms of partial intestines obstruction. Diagnostics of endometriosis is quite hard as ultrasound and CT scans can show nothing. The only method that usually visualizes this condition is laparoscopy - some kind of minimal invasive surgery during which the camera is put inside the abdominal cavity. So if you have abdominal ultrasound and abdominal CT performed, the time has come for laparoscopy. Hope this will help. Regards.