My USB port is dead

A USB Devise Is Currently Drawing Too Much Power And The Port Will Be Deactivated

So that's it, I left my computer on my desk and I went to supper, when I came back I had this message... I was very surprised since nothing was plugged to my computer, exept the MagSafe power cable. I tryed to restart PMU and PRAM (or w/e you call it).

Then, I wanted to get on skype, but it was saying that my webcam was unplugged (unplugged right, it's built-in...) so I took a look into the system information and my usb port for the Isight was not recognized, my second USB port either.... so there's my problem.

I'm a student, I'm writing here because I don't want to change my computer, I like it.

MacbookPro Mid 2010