My husband has been experiencing stabbing pains in his stomach. This has been occurring off and on for quite a long time but has worsened in the past few months. He has had a hida scan of his gall bladder, colonoscopy, endoscopy, ct of the abdomen, ct of the chest, all of which have been negative. He gets sick several times a week after he eats and vomits. He is not one to vomit easy but seems to do it quite often lately. He is in bed right now with pains that he explains as knives in his stomach