You will be fine on the day. I am nearly a year out and my only regret is that I didn't do this years ago. Follow the advice given by your surgeon and your nut, try to get moving as soon as possible after surgery. Take life at a gentler pace for some time after surgery, accept all offers of help! Most importantly, look forward to getting a whole new lease of life post surgery, you have so much to look forward to, trust me on this. Best of luck