Hi, I will start by saying a cat scan has come back clear and normal. No cancers and not hernia, nor any tears or holes found. My problem is that when I engage my core I can get a cramp like spasm which causes something to bulge out under my right / upper rib cage. It is really horrible and makes me want to faint until I push it back in. I have split stomach muscles from pregnancy, and crampy feeling in my back and general core weakness. My ribs in general feel rubbery. Thanks for your time.