You will wake up in pain, I am sure of it... but it will only get better from there! Make sure you walk plenty starting the day after to help get the recovery process going. I walked 2 times on the first day. Make sure you bring stuff to keep you entertained, if you can. Slippers is a great idea as well :).
Good luck to you, and know that following the surgery, things will only get better day by day... and the end result hopefully will be a lot better for you!