Hi light the way

A lot going on with your daughter. Now that she's been formally diagnosed, she will hopefully be able to get the help she requires. What led up to her being diagnosed now?
She has been put on medication which is significantly helping in regulating her moods, which certainly is a positive development. Is she perhaps also getting (talking) therapy?
I am glad you are posting here to learn more about the disorder and how you can best cope with this situation yourself.
We have many parents on this board who are also dealing with BPD children, some officially diagnosed as BPD and others not. I encourage you to take a look around here and also read posts of other members as I think you might relate to several of their experiences too.
Take care and welcome to our online community

The Board Parrot