Hi mjn9, and

First off, let me say how sorry I am to hear about the difficulties your family and daughter have been experiencing. I don't have children, but I imagine it must be heartbreaking to see your daughter suffer as she has. Rest assured you've come to a great site with plenty of folks who can share similar stories and provide some helpful advice along the way.
Not all borderlines are created equal, and doctors usually require only five of the nine criteria you listed for a BPD diagnosis. Whether she is actually BPD or not, her behaviors are alarming, and she certainly needs the help you are trying to get for her. Being a teenager is hard enough--but being a teen suffering from such anguish can be especially difficult for sure.
A great first resource to check out is:
What can a parent do? I also invite you to visit the
Parenting a son or daughter suffering from BPD board. On this board, you'll be able to engage with senior members who can offer encouragement and share their own experiences of parenting a child with BPD.
We are glad you've found us, mjn, and we look forward to learning more about you and your family.