Hi Sara
I slept propped up for the first 7 nights, then had 1 night flat on my back, then was able to sleep on my sides by night 9, but had to be very careful when turning. I think you can expect to lie on your back for up to 2 weeks though, and check with your surgeon just in case (not sure if advice varies depending on personal circumstances). My surgeon allowed me to shower the next day. He just said to not get soap near where the incisions were made. You also have to be careful when drying, just ‘dab’ the area with a towel rather than rub!
Hope this helps!
Good luck!