First off.....It is normal to be terrified and excited!!! I was the same way! :sneaky:
Secondly.....you can't live your life worrying about the "what if's"...If you listen to your doctor and follow the program you should be fine, but there are some things in life that we just can't control.
I was banded on July 27th of this year, so I am still pretty new and learning as I go. I was like you, healthy overrall, just overweight. I was a cash paid patient since my insurance company didn't approve me and it was the BEST decision I have made for myself. I am down 28lbs so far (I started at 200lbs) and am very happy with the results that I have had. I have had a couple of weeks were I stalled or gained but that is just part of it. This is in us for the rest of our life! Good luck to you!!! I wish you the best!