I’m seeing this almost all the time. One of my friends will post “I don’t plan on making a second Facebook account. I have been hacked, do not accept friend requests from me.” But what they don’t realize is they aren’t being hacked at all. People are searching through Facebook and finding someone, they create a new profile with that persons name and they use that person’s profile photo, or one of them. Which profile photos are set to public as default. Then with this new profile they go through that persons friends list (again public, most of the time) and they friend request everyone.
There is no hacking going on here. Simply just impostors pretending to be you. You’re account most likely isn’t in danger and all you have to do is report the new profile and maybe tell your friends to. That’s all!