Alienware 17 help - Graphics card or something messed up

Help, my screen is messed up. Pixels are discolored, and I know it is not the screen since they shift around when I move things. They are not fixed. I have tried changing the graphics card settings (involving restarts). It happened a little while ago, but it slowly resolved itself back to normal after about 20 minutes of being on, but now it is back and wont go away. I updated my driver and did everything I could think of.