My husband is having a MENTAL BREAKDOWN right this second!! do i call the police?? my parents?? what?

He has been up literally all night cleaning like a crazy person. Now that i try and talk to him and get him to calm down he starts screaming and yelling and walking back and forth. I"m scared he is like posssesssed or something!!! If i leave i risk permanently ruining our marriage. Same if i call my parents or the police and i dno't know if im' ready to do that. I need some time and space to think without this crazy person. I've locked myself in the bathroom to stay away from him. i'm terrified!!! please please please help!!!