I had the same butterflies. It was a lot better than expected! My fear was having a catheter, but that turned out not to be an issue. One funny thing, I have a good amount of chest hair. I felt bad for the nurse who had to shave me. She shaved everything from below my breasts on down. When she was done, it looked like I was wearing a black bra! I told her that and she said she was going to have problems getting that image out of her mind!
Good luck tomorrow and stay positive!