I swear my behaviour with her has been always aloof in the worst case, basically because I always was afraid of her, her outbursts of rage. I'm a quiet BPD, and never lashed out with family (nor even with romantic partners aside of avoiding them) basically because my triggers are related to romantic partners and as I said the worst I did was assuming they didn't like me and leaving or avoiding them.

She asked me some questions about household stuff and as my replies were not exactly as she expected she started insulting me out of nowhere. She went from 0 to 100 in seconds for no reason. It's because this extreme attitude she always had with me why I developed BPD and anxiety, yet she accused me of being gross to deal with and crazy "like my grandmother". Then she threatened me (I work but I depend on her). She even brought up that two months ago I failed to say hello to her boyfriend and using that as a proof I never say hello to him. Stuff as that.

I promise I did nothing wrong. I was actually happy because I was feeling confident, attracting some good social vibes, satisfied with my working out session, etc. Then this happens out of nowhere. It's as when I was a kid, dared to feel happy but when I came home, went on vacations with them, she started yelling and getting angry when I least expected it.

Most of my BPD and anxiety comes because all the hypervigilance she caused me when I was little and a teenager. Her extreme reactions took a toll on me 

Thanks mom. Hope you feel satisfied when you finally have to call the cops because I killed myself.