Tummy tucks?

I'm having a tummy tuck operation next week and i just wondered from anyone who had had the operation or knows anything about it a couple of questions that i forgot to ask my surgeon at my consultation. I wondered if its ok to bath/shower after or if not how long do i need to wait, i also wondered how long after is it safe to drive. The other question i wondered was what painkillers do they give you after. I have chosen to have this op as i've had 3 children in as many years, lost 4 and half stone in weight and been going to the gym 3 times a week for the last year without my tummy improving whatsoever, if anything its actually got worse!!