Coming home from a trip today, I attempted to turn on my MBP to get out the disk that was inside. However the computer wouldn't turn on. Not worried about it, I decided to deal with it when I got home. When I got home and powered it on, it got stuck on the white screen with the apple and the spinning symbol (not the colorful one).

I'm curious if there is a way to fix this?

I do not have the restore CD, plus the CD is for OS X Snow Leopard, and i'm running Lion.

Is this something I will have to go to the apple store for?

Specs: (If it matters)

3.06 Dual Core Intel
8 GB Ram/Memory
500GB HD
Lion OS X