White Screen of Death? maybe :\

Okay, so I have an instinct obviously. I've had it for almost 2 years now. The work as been working decently. I got a couple "lit up, black screens" and some lag, But all in all, it's been pretty good.

This morning my phone was working fine, now at lunch. I got a white screen. I've tried the battery, plugging it in..random things to make it work. No luck.

It loads up from the samsung screen, to the bell, then i get a quick glimpse of the homepage, then back to the bell load screen..the nothing, a white screen.

It's possibly the biggest letdown yet. Any ideas of what i can do ? pleasee?