Have your Facebook friends told you they got a new friend request from you with your name and picture, but with little to no profile information?
It is a classic case of cloning. First, don't panic. Your account hasn't been hacked. Scammers have just copied your public profile info to create a new, fake account.
Second, report the fake account to Facebook, under "pretending to be someone."
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Third, warn your friends not to accept the request from the fake account.
The person who made it is likely trying to scam your friends.
Post a message on your timeline letting everyone know it's not you.
You may also want to tighten your privacy settings and limit who can see your profile details.