Hi Mom1234 and welcome

I'm so sorry to hear about your daughter and her suicide attempts. That is terribly frightening and beyond stressful. I have only experienced suicidal threats on a few occasions in the past from my APD son and that sent me into another stratosphere of distress and anxiety. Generally personality disorders such as BPD are not formally diagnosed until the person reaches adulthood, is "mature", and the behaviour has stabilized into a pattern. This doesn't mean that the person doesn't have BPD.
As Swimmy said, it is extremely important to self-care in any way you can. My saviour has been art and therapy. I have my own therapist who helps to keep me grounded, stable and provides me with the appropriate tools and psychoeducation. This support has been my lifesaver on many occasions and much better than the judgemental and subjective support I have received from family or friends who do not understand BPD. Anyone who has not had a lived experience of BPD, or is not educated about it, cannot fully understand, which is why a forum like this is great - people do understand and can relate.
Please let us know how you and your daughter are getting on.
Take care
Juki xx