hi,
firstly it depends on how much anathestic they give u, i had it done twice, the first time i was knocked out and didnt feel a thing, but they couldnt put in the balloon cos of ulcers, and the econd time a few weeks later i was awake, i had a local spray on my throat etc. but i was awake and it wasnt nice, but it didnt take long.
secondly - they would take out the ballon and do bypass at same time, in my case they took away the gastric band, i had, removed the balloon and did a gastric sleeve on me, i was in theatre nearly 5 hours, but everything was fine, i was home after 3 days, and i weighed well over 32 stone. at the time
so please try not to worry about it, in a couple of months after it youll wonder what the fuss was, but just remember - when u have had bypass or balloon, listen to your stomach, when u feel full stop eating , but try and drink as much as poss. cos dehydration is what causes loads of problems. also and finally the bypass, balloon, sleeve etc. is only a tool to help you, they can stretch over time if u over fill them- stomach that is, i have abused mine in the past and got nowhere because of it, just felt ill, but now i feel on the right path.
golden rules (in my book anyway) - drink lots, exercise, watch your portion size and main one listen to your stomach when it says im full - dont eat nothing else.
hope that all helps
take care
stew