It's just a security system that auto locks your acc. when someone types the password wrongly too many times. If that's you, then it's fine, just wait awhile and your acc. will be fine. But if it isn't you, then you better change your password in case it's someone trying to get in. Apparently, I answered too late, but whatever. (x
It's something that locks your account for a short period of time. If you type the password wrong too many times, it'll lock your account. It's nothing bad; you won't lose anything you had in your account.