It's normal to be nervous and scared. I was afraid that I was going to back out at the last minute, and I don't remember getting any 'cocktail' before surgery. Hubby had a pretty good cocktail before his surgery in May and doesn't remember a thing but he was having a major panic attack prior to surgery and his surgery wasn't elective.
In the past when I have had surgery I could tell when they started the meds to put me to sleep, this time I didn't feel anything, just woke up in the recovery room where they were anxiously waiting to move me back to a room (I took a several hour nap after surgery...)
The time will fly between now and then, for me it was kind of surreal, I knew it was coming up, but it didn't really sink in just how close until I was leaving work for the last time before surgery.
Remember that you made the decision when you were thinking clearly and looking at what was best for your future. You don't want to second guess when you are not in the same calm frame of mind.