I had gastric bypass in 2009. Haven't had any complications since until recently. Had severe upper stomache pain and lower back pain for the past 2 weeks. Went to doc and last Thurs. had laparoscopic surgery and surgeon fixed the obstructed bowel from scar tissue I had. Went home Friday, the next day, and for 4 days later I felt extremely weak, feeling faint, nauseous and light headed and some upper stomache pains. Went back to doc and 2 days ago had to have and upper GI endoscopy. He did not find anything. Now have very bad burning sensation in chest. Is this normal? Is it also normal to feel so weak, dizzy, and nauseous still? I am usually a go-getter but now I can't do anything but leu down. Is the burning normal as well as the feeling of not being myself? Help, thankS