No problem and remember, you are going to have pain. They cannot take it all away but they can help it.
You have a very long road ahead and you are going to be really, really, really, sore! Each day should be better then the day before and then you will be all better and ready to get your back fixed.
If you can take percocet, that is what I would recommend you ask your doctor to prescribe for you, for post operative pain control. 10/325 is the dose I would ask for becuase there is less tylenol in that, you can take 2 every 4 to 6 hours and not worry about od'ing on the tylenol.
Again, good luck and get better! :d