Infuriating MIL??

Hey guys I live with my MIL and it’s been one fucked up ride. (Quick background I also love with my s/o and 2 babies. I get along fine with everyone except her) She’s a legit fraud and she does a bunch of illegal shit (lying she takes care of an inept daughter who works perfectly fine, benefits fraud, etc).

We butt heads a lot. Sometimes she tells me I’m messed up in the head and to go to a therapist and it scares me because I believe her. Is there any way I can get a psych evaluation? I want to prove to her I’m not because.. idk I’m pretty sure I’m not. But if I am then it will help me either way. I’m not sure how to ask my primary doctor about this.

I overheard her the other day telling her daughter that she thinks I’m bipolar based off of google.

I really want to move out but she always says “oh you think your mom will want you back?” Like what the hell... and she says it so innocently and like she’s concerned.

I have no idea who or what to believe because when I tell my mom and best friend about what goes on they think it’s her. Help!

Edit: I do want to move out.. but I haven’t saved money for it so I would have to move to my mom. I talked to my boyfriends sisters about this and they say why should I move out if my relationship with him is fine and why would I want the babies away from the father and to ignore MIL... idk.. maybe I should.