I'm sorry you have to have surgery, sunrise, but I hope they can help you feel better.
I have had general anesthesia many times and it is wonderful. I too have apnea and I tell the anesthesiologist this as well as that I have nausea after anesthesia and they monitor for the apnea, leave the oxygen on longer maybe, and they add an anti-nausea drug. I have had it so much I am completely comfortable with it and I trust it.
I could never let then mess with my spine. That scares me way too much!