I was trying to do something in the material tab and I messed up my windows ): I can't even see my preview and other stuff is messed up to. Please help ): What do I do to fix this? This is not normal.
You could try Edit Preferences Return to factory state.
Well... it looks to me like you're in the Material room. Did you want to be there? You can get back to your main window screen by clicking the word "Pose" in the upper left hand corner.
Edit: Chohole is correct for how to return it to factory state. :)
Tried "Launch to factory state" under preferences and then shut down and restart?