Open your oild cap and look inside, with the car turned on, do you see oil running around the cam, or jumping outside. If yes, more than likely everything is fine. Your oil pressure sensor could be bad. It hapenned to me, I started freaking out about it, I was about to buy a whole new engine, because I'm paranoid like that. It was just the oil pressure switch and only $6.99. If you can't see oil, you have to look deeper into it.

Good Luck