So I tried Chaos% last night, and I think that screwed something up, because now whenever I try to load the game normally, it uses the HL2 crosshair instead of the Portal crosshair. Even my Steam version is having this issue, and I don't even play that version! Someone please tell me how to fix this!

What does it look like, can you post a picture?

Maybe I am retarded but isn't HL2 crosshair the same as Portal crosshair ? Maybe you are talking about the HUD ? Or the suit crosshair ?

crosshair 1 or hud_quickinfo 1

or because you were using chaos%, exec chaosOFF.cfg