i have had a pain under my rib cage on the right side for abot 2 years now. its ususally off and on but its been more frequent lately. i can feel it starting to hurt and the pain gradually gets worse when i breath out. if i over exaggerate my exhale i can feel something move under my ribs like something is turning over or something. it hurts pretty bad but after it turns over or whatever it does the pain goes away. i have no idea what it is. anyone have a clue?