I'm so sorry to hear of the difficulties you are experiencing with your DD. Many of us here can to relate to the all-consuming nature of this disorder, you are not alone and I'm glad you reached out to us for support.
Regarding inpatient treatment, has your DD shared why she is resistant to the idea? It sounds like you could really use a break - having her at a residential treatment facility would likely take some of the pressure off of you, give you some room to breathe.
I echo what
Faith has written, self-care is of utmost importance, otherwise we can become resentful of all we have done to support our children - missing work to return home to check on your DD, worrying about what's next, all that stuff leaves little room for you. Do you have support in real life? A therapist, friends you can confide in? Many of us find working with a therapist who specializes in BPD to be helpful. I have just one friend who "gets it" so I'm really glad to have bpdfamily as another layer of support.
I hope you'll find posting here to be as beneficial as so many of us have and I'm really glad you found us.
Again, Welcome!
~ OH