Hi there TexasTrio and welcome to the family
I’m right there with you , feeling utterly terrified at the thought of having your DD home and feeling responsible for keeping her safe . It’s utter hell. My DD was 15 when she was first diagnosed and we’ve been through the absolute ringer with her . We are coming out the other end of the tunnel now , she’s 18 now and seems to have matured to a level necessary for getting her life on track . She was way down in the deepest darkest cesspits of life and I literally watched it happen as she went from bad to worse and each of the BPD criterial came out one by one on all their glory Urgh ! I still have post traumatic stress from it all!
I’m not sure what I can say to make this more manageable for you other than to just give you hugs and say I’ve been there too . It WILL get better . I think one important thing to do for yourself and for your family is never give up hope that things WILL stabilize . Even during our toughest times , I did keep a tiny shred of hope that our lives would somehow be liveable again . And that’s exactly what’s happened

Things I found myself doing when my DD was being discharged . I’d clean her room and change her sheets etc so that she’d feel more organized and happy to be home ( not sure if that was a good thing to do or not ... .sometimes she’d be thankful , other times she’d be mad because sh would think i was invading her privacy etc ). But nonetheless, it would make ME feel I was doing something nice and useful . I’d buy in some nice food and we would always get an Indian take out curry on her first night home ( how ridiculous is that ! That she was in hospital so often, it became a ritual that she expected and looked forward to !) I would make sure all medications were still locked up and I would hide all the razors ( which was kind of senseless because my DD always kept a stash of them anyway and if I threw them out she would only go buy more ! I knew her hiding places and i would count how many “ new” ones were there - my theory being at least I could monitor just how often she was cutting herself and make sure she was using clean razors ... crazy huh ? )
I would always have an extra snoop around her room /phone etc and would use the time she was in hospital to make sure I knew as much as I could find out about what was going on in her life without the fear of her walking in on me and finding me snooping ! Again with hindsight , it felt right at the time and helped me to feel more “ in control “ because I felt if I knew what she was getting up to , I was better placed to inadvertently place many spanners in her works and protecting her from herself sometimes ( eg I knew when she was planning on heading out to have sex with a stranger so I would “ innocently “ put a spanner in her plans to stop her . In hindsight , I drove myself absolutely nuts with my inspector gadget behaviors and I really didn’t do myself any favors because I was constantly stressed . And when I was feeling stressed and sickened in the knowledge of what my DD was getting up to andnall her lies , I was more confrontational. That was never good!
Many of my “ coping “ mechanisms weren’t very helpful . But as time moved on , as we participated in family therapy , and as I learned more about BPD , together with this forum and learning how to use the tools in this website , I was able to manage my own emotional responses more effectively. That helped my relationship with my DD a lot .
Keep posting here , we really do care and support each other xx