Facebook account unavailable

Can some one please help me, i was on facebook yesterday and everything was fine. today i came in and got on my boss's computer (the same one as yesterday) and she was loged on to her facebook. which is normal so i loged her out and tryed to log in. but a thing poped up saying my account was unavabile, and to follow the steps. so i tryed to fallow the steps and about halfway through it took me back to the sign-in page. it kept on doing this over and over. i then tryed to log in on my phone and got the same message that my account was unavabile to try to log in on my computer.

Can someone please help me?