Well, the bad news is that percocet is exactly the same as oxycontin, which is one helluva addictive drug. The worse news is that it is mixed with acetaminophen, which if used continually can cause liver damage.
The good news is that you are only using 10 pills a day which for an oxy addict isn't very much at all. You would have to take 16 percocets a day to match an 80 mg oxy user, which is still a pretty low dose compared to some of the folks on here. So your withdrawal shouldn't be anywhere near as bad as most of the stories on this forum.
That doesn't mean it won't suck! Best of luck to you.
What are you going to do about the pain? I assume the pinched nerve hasn't miraculously healed itself.