I am two weeks post op. I lost 20 lbs on my own before surgery and I have lost 13 pounds in the last two weeks. I am recovering well but the gas is crazy.. what causes it. in my previous life I would get gas from drinking tonns of diet coke...but in the months before the surgery I gave it up and felt great. Now I am 2 weeks post op and I don't understand why there is so much gas. It isn't the surgery gas either.. that was better after the first week. Can anyone give me some advice on what I can do to make it better? Does this ever go away?