I agree with Allika, make sure you have some gatorade in your house. Also, they told me to use a heating pad afterwards, which I found pretty comforting. Besides that, rest up!! Get some good movies and sleep! Definitely don't be afraid to take the pain meds they prescribe. I'm usually not a big fan of pain medicine, but I used it for a couple of days which made me feel better.
I was really nervous, but it wasn't too bad!! Good luck!