I just moved in with my girlfriend. She's 17. I'm 21. We've been here a week and she has been out of control. I don't want to give out a lot of details in case she stumbles upon this but basically she's becoming very violent. I had to wrestle away a knife from her. She screams and kicks me and slaps me and it's getting worse. Right now she's fine but I'm so scared of her next outburst. I don't know what to do. I am unable to drive so she does the driving. I'm too ashamed to move back home so that's not an option. I had a bad home life. She told me she will tell the cops I raped and hit her if I leave her. I know they take rape claims seriously so I don't know what to do. Can anyone help me or talk to me who has been through this please?

UPDATE: I've been recording her. We had another fight where she spat on me and kicked me and slapped me. I have her admitting she will file a false rape charge if I leave.