Talk to your doc and see what they say.
A little odd that they would hand out Valium for possible withdrawals for one month of Percocet, but I'm not a physician.
In my experience, it's not about becoming addicted, it's about being an addict. (In NA we tend to use the word "addiction" the same way they use the term "alcohol-ISM" in AA). The drug doesn't matter all that much, what matters is if we are getting loaded, why we are using it, is it making our lives unmanagable, and are we being honest?