Hi Kitty - I promise this will pass! The first couple of days you're thinking "oh my gosh, what did I do to myself" but honestly, the more up and walking around you do, the faster you will heal and the better you will feel! The "fist" feeling you are having is exactly that - the gas working its way out of your system...I described it as a horrible burp that wouldn't come up. It goes away - I've been banded since April 30th, have lost 12 pounds and am feeling really great! Drink lots of Water so you don't dehydrate. Sips....remember sips. Also, warm chicken broth really helps with the pain and feels so good slipping down.
I took a full week off of work and was ready to go back by then - you will too. On about day 4-5 if you are up and walking a little bit around the house, you will be amazed how much better you will feel.
Good luck!