People are receiving friend requests from a "new" account using your name and photo (this is often a rather than a direct hack). How Hackers Get In What to do if your account has been hacked - Facebook
There are new posts, comments, or private messages you didn't create.
If your Facebook account has been compromised, or you're seeing signs like posts you didn't write or login alerts that aren't you,
You received a notification about a login from an unrecognized location or device.
: If possible, attempt recovery from a phone or computer you have previously used to log into Facebook. Facebook's security algorithms are more likely to trust the request from a recognized device.
People are receiving friend requests from a "new" account using your name and photo (this is often a rather than a direct hack). How Hackers Get In What to do if your account has been hacked - Facebook
There are new posts, comments, or private messages you didn't create.
If your Facebook account has been compromised, or you're seeing signs like posts you didn't write or login alerts that aren't you,
You received a notification about a login from an unrecognized location or device.
: If possible, attempt recovery from a phone or computer you have previously used to log into Facebook. Facebook's security algorithms are more likely to trust the request from a recognized device.