Facebook deals with hacking attempts regularly, but if there was a major data breach, Facebook would notify users. However, your individual account could still be targeted. Some signs your Facebook may have been hacked include: ●     Strange messages or posts on your timeline that you didn't create. ●     Friends reporting messages they received from you that you never actually sent. ●     A new app appears that you don't remember adding. Delete it immediately. ●     Your profile picture, cover photo or other account info has changed without your knowledge. ●     You're locked out of your account or your password no longer works.