Hi Ross-
It's a scary surgery, let's face it! The only way to probably get through the waiting period (hopefully it won't be a long one for you) is to say to yourself,
"today, I feel OK, not great, but I won't worry about things today, I'll only worry when it's really necessary, like a couple of days prior to surgery. My surgeon is fantastic, serious about what he does, and has expert training and experience. He's probably seen it all before, and much worse than my case. I'll do the best that I can to keep myself in good shape mentally and physically to prepare my body for the healing that is to come. The rest is out of my hands. Let the experts worry now, that's their job. Mine is getting better and I will."
Good luck Ross.