My Email

I have several crossfire accounts and i can't remember for the life of me the email connected to this one. Is there any way i can find it out so i can change my pass? Some one got my pass to one of my accounts, and of course i am a dumb ass, and use the same one for all of them. Once i have the email i will be good, i don't even need to know which site it's registered with, just need the name before the @. Thanks.