Sorry to hear about the recent setback - that sounds traumatic! Are you okay?
I guess the place to start is to look at what you want. Do you want to stay with your partner? Are you thinking of leaving? Still trying to decide? There are specific boards here with great advice tailored to each situation. There are also lessons available that teach us how to cope and how to set up boundaries for our health and safety. It's really important to ensure that you aren't being injured as you navigate your relationship with your pwBPD.
How long ago was your partner diagnosed with BPD? How long has she been doing the DBT?