I had my surgery on Feb 18 of this. The first few days I had really bad gas pain in my chest, upper back and left shoulder. A couple of days ago I started having pain in my left rib cage. I sit up all day and most nights to help with the pressure. I take Gas-X strip and pepcid but, the pain is still present. Taking a deep breath or moving is very discomforting. Can anyone advice me about my condition?