TOMMORROW!
You'll do great! Get a good night's sleep tonight.
I was up and walking a little bit that same evening after surgery and as often as I could possible after that - was on my way home by noon on the second day after surgery. Each person is different though so just do what your best.
Relax and know how many people are lifting you up in thoughts and prayers. You'll be yet another loser before you know it - welcome to the club!
Sharon