IPhone 4S camera won't work?

My camera won't work in any app or even in lock screen. My pictures are fine but the lens won't open to take a picture. My flash light was on for a very long time and it took forever to finally get it to go off. Don't know if its related or not.

The reason to get a DROID

It has happened to me before on my iPad. One day it was working fine, next thing I knwo the lens aren't opening. I waited a couple days before calling Apple and within those couple days it opened again. I guess you have to wait couple days or try restarting your device. I don't really know the reason.