Most likely, it's just gas pains from the gas they pump into your body during surgery, and it's completely normal. I was banded two days after you, and while it has eased up a bit, I'm still having those same pains on and off.
From what I've gathered, the gas relief medications don't work because the gas isn't intestinal, but sitting in your abdominal cavity. Generally, it's suggested to get up and walk around a bit to shake it loose. I've also read, and one of my nurses recommended, rocking gently in a rocking chair to help.
We know how you feel -- it's definitely not the most pleasant feeling, but will be worth it in the long run :sneaky: