I have what I call a "corset feeling" that goes all the way around my diaphragm, under rib cage, down to my hip bones. I go through it once a month, a couple days before my period. It didn't start up until I had been taking medicine called Butalb. I quit that medicine in hopes that it would make the pain go away, but it hasn't. It makes it hard for me to take deep breaths, move, talk, laugh, and makes me feel nauseous. I feel like I can't move or it will make it worse for me. It last for 24-48 hours. I thought at one point it might be related to acid reflex, but I don't have any other symptoms. Then I thought it was constipation, but I still get it when I am not constipated. My doctor thought it was because I took Excedrin every day without food. But I quit that too and I still have it. I am at a lost as to what I should do. It's like no one is willing to do anything for me to find out what it is.