Help with current family situation?

Current conditions are absolutely hell. My mom has multiple personalities and they're mostly evil. She insists that my father who does not live with us is manipulating me to attack her. She always makes blanket statements like that without backing them up and when I try and disagree and assure her nothing's wrong she doesn't let me even finish, then assumes she knows what I was going to say and takes it as "fact.' She can't understand a word I say and she insists it's because I have Asperger's disorder even though she's the only one who has a problem understanding me. The other night she threatened suicide and locked herself in the bathroom while screaming at me. Again, she couldn't understand what I was saying. At one point I said, "Just because you don't understand me doesn't mean I don't know what I'm talking about." Tell me, you can understand that SIMPLE sentence, right? I asked my sister who was with me outside the bathroom door if she understood it and she said yes but my mom insisted that my sister said No and that I'm lying and twisting things around to get what I want. She also insists I have bipolar disorder despite not having symptoms and the fact that bipolar is a condition that normally manifests LATER in life. I told her that and she said she notices "minute" signs without even saying any of them even if I ask her.

She also spends hours upon hours ranting about things that "stress her out" even though she can't do anything about them. Like, 7 hours. Help.