Computer Resolution Problem

Okay so about half an hour ago now I think, I accidentally hit the sleep button on my keyboard. Every time I manage to accidentally hit that button everything freezes up, so I basically freaked out and started hitting buttons in an attempt to bring it back to life again (though to no avail, it completely ignored me and went to sleep and I had to hit the power button to bring it back). When it came back up, surprise surprise, there was something wrong with it. My computer's resolution had been set all the way down to 640 by 480.

My monitor's native/recommended resolution is 1440 by 900, so I set it to that. But now everything is really really tiny. What's more, the computer doesn't seem to realize this is in fact not 1440 x 900, but the monitor does, and has been periodically giving me messages about the incorrect resolution. I've restarted the computer, I've messed around with the settings, the monitor keeps trying to fix itself with some sort of auto processing, but I can't get the resolution back to the way it was. Setting it to a different resolution that's similar -- the closest I got was 1024 by 768 -- doesn't help much either. The difference is still big enough to tell and the monitor still doesn't like it.
So I was wondering if anyone here has any suggestions. I've never seen anything like this before, so I just thought I'd ask. Oh also, yes, I did press all the buttons down on my keyboard again to see if I could reproduce the issue xD... Help? ._.

EDIT: Fixed, nevermind :> ... Could someone lock this please?