TLDR: my sister has BPD. Shes had various degrees of help, including meds, therapy, and involuntary and voluntary commitment. Shes getting worse and acting paranoid, with sharp changes in behavior. I want her to get her help but shes an adult. Idk what to do. 

I am f19. My sister (f22) has BPD. She’s my older sister, and moving past all the trauma and drama that has been for me, I love her dearly. She’s my only full sibling, we grew up together. She was the “problem” child- drugs( weed, coke, xanax, adderall, probably more that i dont know ) sneaking out, fighting and whatever.We grew up in a pretty normal home, divorced parents but civil parents, shared custody, upper middle class. Never asked for anything, we were spoiled. Not to say mental health cares about your social class, because Ive had my share of experiences with mental illness as well as skirting the lines of addiction- but just for context. She went to rehab about 4 years ago. They diagnosed her with BPD. I am extremely confident in this diagnosis as it was one of the best treatment centers in the US. She fits the criteria. Last year, she seemed to be more stable. Decided to quit her meds. 

We live in the same city now, so we see each other often. We went to a private catholic school growing up which caused both of us to.. uh.. deviate from catholicism? Well the last couple months she changed her view. Now she KNOWS there is a god. Honestly? I’m all for the passion,, it gave her purpose, and we don’t have to always believe the same things. But she cant go two seconds without talking about it, so I just listen and try to have an unbiased conversation about it but it has gotten... worse. 

I am a sucker for conspiracy, dont get me wrong. I know some are true and some are just fun to theorize about. But I saw her the other day.. and the topic of religion festered into... celebrities eating babies.. cutting their heads off... drinking blood...obama is the devil (she is super liberal. or was. our whole family is.. i dont like Obama but.. ??) The mark of the devil etc etc. Then she told me shes heard a girls voice in her head since she was a kid and she KNOWS it was/is the devil. And she said she used to black out when she was a kid because she felt gods presence in her and was overcome with joy. 

She used to be really into tarot cards, horoscopes, crystals and whatnot. I’m into that- apothecary &amp; tarot. i have a tarot tattoo. But now its evil. Its the devil masquerading. Its just frightening because of how different her views are. Shes alone a lot. She has a boyfriend and a dog- but bf works and dog is psycho tbh. Shes alone. No job. No school. She talked about pizza-gate the other day with such a level of frightening confidence that I just smiled a little. She yelled at me to never laugh at her. And how shes worried I’m gonna go to hell because I went to catholic school and I was introduced to god and I pushed him away? 

Maybe god is real and maybe ill go to hell but...? To me it seems like shes going down a dangerous, paranoid path. 

How do I even help her? Could she be using xanax again? She seems way to “up” for that, but. Im worried about her.