Hi ~ I'm one of those who require more than "normal" dosages of pain meds, plus I often wake up during surgery.
I've been like this since I was a child. I guess I take after my Dad.
When I'm going to have surgery, I ALWAYS talk to the anesthesiologist who will be attending me, so I can explain how I wake up during surgery. I've NEVER had one ask me to discontinue my pain meds -- that's cruel! The anesthesiologists have told me that waking up during surgery isn't that RARE. They have said that it happens often. I must say that it's frightening -- I was having spinal surgery so I was on my stomach with my head buried in a "face pillow." I couldn't tell anyone I was awake cause I'd been given the drug to keep you from moving! LOL Finally, someone saw that I was awake -- I didn't feel any pain, but it was just scary.
Don't cancel your surgery -- just ask to speak to the anesthesiologist that YOU will be having the morning of your surgery. Best of luck. Hugs, Lee