You may have gotten a Facebook message from a friend saying that they’ve gotten another friend request from you, asking you to forward a warning. Don’t fall for it – it’s a scam.
You can pretty much bet that any message that you get that asks you to paste and forward it to all your friends is some kind of scam. The latest is a message that says that your account has been cloned or hacked, and that you should forward the warning to all your friends. Don’t do it. It’s likely the message itself it is a scam, and could make your account vulnerable. Here’s just one of the messages I got: