It probably is gas but also, your body has undergone a traumatic experience and you may be feeling bad because of that. I sure did. In fact, I was so frustrated after five days that I broke down and just cried. I was nauseous due to the liquid medication, hungry, and having trouble keeping anything but water down. SO......I guess I was overwhelmed and weak. The good news is I'd lost 25 lbs in three weeks--when I visited my Dr post op. Now it has been over six weeks, I'm to have my first fill on7-19, and I've gained a few lbs. My fill should help me begin losing again. I have to start pushing myself to exercise, too. I've been walking, but very little.