I had to take a break from here, for just a little while. The chaos of working all day, dealing with BPD SD and the drama, along with a variety of out of state visitors, wore me out. In fact, I'm home sick today since I've been burning the candle at both ends for too long.
We also had some shocking discoveries when we checked the texting activity on her phone. WOW... .all night long... .hundreds and hundreds of texts. It hit the fan in a big bad way. Now, she keeps her phone on the same charging station her dad and I do, and we have a rule of no texting after 11 pm. And she knows it's a few mouse clicks to check that. If she gets back into that, we just shut off the texting capability.
We found SD a therapist and she loves him. We found 2 therapists near our home that work with BPD patients and asked her to review their bios and pick one. There was a young female whose bio was "unicorns and rainbows" (her description) and an older man who was pretty much no nonsense. She selected the older man and dh and I went with her to the first appointment.
She's been going 2 times/week and just this week he's scaling her back to once a week.

More importantly, we finally got her on some meds that are most helpful. Apparently the BPD is coupled with Bi-Polar and ADD. Anxiety was getting the best of her, and us. So she now finally has been to a psychiatrist and is back on meds and she is starting to seem like the old version of herself.
The best thing is that she is relieved to know there is a name for what she has, there is therapy to help her, there are meds to stabilize her moods. Baby steps... .