Hi New Me, My Daughter and Grand Daughter had a gastric sleeve done almost 1 year ago in Tijwana , Mexico. I went as their care giver. I think their big pain was also their back. I believe it is from the co2 gas caused the pain that they used in surgery. Within a couple of days they were doing well, but they walked, walked, walked, and walked some more. They have done extremely well grand daughter has lost 111 lb daughter almost that much. Hang in there it will be better.