#21 - Dec. 21, 2012, 9:37 p.m.
PS: I sent in a ticket as soon as I found out it was fake and changed my password but i'm very worried.
If you provided your security answer on a bogus site, Silentmeta, then they have some of the necessary information to access the account.
Changing your password is certainly recommended, but you may also want to change the email address associated with the account.
As some of the others recommended, you may want to look into picking up an Authenticator. We have a
physical and a
mobile version.
If you do have a compatible smartphone I'd recommend looking into the
Battle.net SMS Protect feature, that will help you manage your accounts security options.