twinging pain upper left abdominal, right below rib cage. has been more noticable at night while sleeplng, but now significantly bothering me standing up teaching. feels like something try to push out (reminds me of when I was 8 months pregnant- and no I m not) no other symptoms (regular bowel movements, etc) white female, 48, 170 lb, 5 6, non smoker, normal blood pressure, pretty healthy overall.