I took a 10 mg percocet yesterday at around 4pm because a pinched nerve in my lower back was acting up. At around 5:30, I went and played some intense basketball for about an hour and a half ( I realize the irony there )... I also went in the steam room for a little bit at my gym. I felt fine, but later that evening, I began getting a horrible headache. I've drank plenty of fluids today (the day after), and have been taking tylenol all day for the headache, but the headache has been pretty bad and it's already late the next evening and it's showing no signs of going away. Should I be worried that I did something to myself by playing sports while on percocet? Please help me out, I'm a little worried...