Nervous

I go for my pre-op appointment on Monday and also start the pre-op diet.  I’ve been dieting all along and have lost 23 lbs on my own. What if I don’t lose the 10lbs needed before the surgery? Will the Dr. cancel? I’m more nervous than excited about the whole process. Any tips? I'll be attending Julie's support group at RWH days before the surgery, so I hope to see you there and get some feed back on how to prepare mentally.