I'm sorry that you are still experiencing some issues. The muscular aches and pains are most probably still from the absence of the percocet and your body's attempts at convincing you to take just a little bit of percocet.
Try some of the topical over the counter rubs, like bengay or aspercreme type of massage /pain relief rubs. Those may help ease the achiness.
As for the light headedness- it could be from the stopping of the percocet, but if it continues, I would at least see your GP about it.
Let him make sure your blood pressure isn't too low and that there aren't other physical reasons for it.....better to be safe than sorry.