I am so sorry you are having pain like this. I would continue to look for answers. It could be many things, and you need a gastro doc that listens to you. I went with pain for two years, and finally got a gastro doc that listened. He found ulcers during a endoscopy (none of the others thought that test was necessary), then a problem with a hernia repair from a CAT scan. Keep looking, don't give up. You know something is wrong, and you deserve someone who will listen to you and provide a proper diagnosis. Hope this helps!
Amanda