I had the lb about 6 months ago. I came home feeling ok then started feeling terrible pain in my chest. I went back in they put me on an IV with antibiotics, fluids and pain meds. I wonder if I got an infection in the hospital. They did an xray and my band was fine. They never quite figured it out. I am glad I called right away I was home 4 hours when I started feeling bad. If you don't feel right afterward follow your gut. I stayed in the hospital another night and that really helped I was fine and doing great a few days later. I am down 45 pounds now. Good Luck