Hello, I was sleeved On Feb 20th /12 and it took me about 3 weeks before I could even drink 60 onces aday. My doctor told me just to keep trying. I was sore for awhile aswell. Do to all the gas they pumped inside me. I was told not to chew any GUM, cus it cause more gas at that time. Needed to wait for like a month, witch was hard for myself cus I was a smoker!! It well get a lot better, all I can say is keep walking it does help. When I was in the hosptail the nurses would drive me crazy with all that walking, But it helped me alot getting the gases out of my system. and my chest didn't feel like it was about to crack open, It will all work out. Good luck