Am i registered to vote?

i filled out a slip my senior year and i was 17 at the time, i'm now 19. everyone keeps saying that i am registered to vote but i didn't recieve anything in the mail. what should i do? i really wanna cast my vote!
Update: COUNTRY'S SITE?!?!?!?!? I'M AMERICAN.... BORN AND RAISED HERE!!!!
Update 2: and im deff. voting for obama!!!

obama/biden '08
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