For 9 months I've had upper right abdominal pain that comes on slowly 1 or 2 days before my period, gets severe by the 2nd day of my period, and slowly subsides over the course of the 5-6 days. The pain is in the same place every time - just below my ribs and 2 inches to the right of my navel. At it's worst, I can't bear to touch it. I can't walk around because the jarring makes it worse, nor can I sit because any tightening of my abdominal muscles aggravates. It is painful to take a deep breath. I'm losing 1-2 days/month due to the pain. I've had a pelvic sonogram, upper ab. sonogram, upper ab. CT scan, and a HIDA scan, all of which were negative/normal. My gyn doesn't think it's gyn related but suggested I have my IUD removed just to see. She ruled out endometriosis as I have no other symptoms to indicate that. My gastroenterologist was sure it was my gallbadder until the test can back. Also,she is mystified by the relation to my period. I'm a small person (5'2", 117 lbs) but gain 5-7 lbs during my period. Is it possible that the bloating is putting pressure on the gallbladder causing the pain? Or perhaps a nerve so it's not gastro related at all? I'd appreciate any thoughts you can offer.