I know NOTHING about any of this, I am only one week post-op. But in one of the forums on this site, there people discussing severe upper chest/shoulder pain and said it was gas pain. Several of the folks commented that they thought they were having a heart attack. One woman's suggestion was a heating pad, (actually several folks suggested that), and peppermint tea. I have no idea if this helps, but may it won't hurt? best of luck!