Hi Nikafee and
You definitely are not alone and have found a place where parents and grandparents come to talk and share about their experiences and learn new and better ways of coping. I am glad you found us.
The book Stop Walking on Eggshells is good to read. You may also want to read
Loving Someone With Borderline Personality Disorder by Shari Manning
Can you tell us more about your struggles with your daughter's behaviors and does and does not work for you in terms of coping? These relationships are very difficult and a lot of what we do and say naturally can come off as invalidating to our pwBPD (person with BPD) which can make situations worse. I am not saying that to blame you though. None of the ways of responding to and understanding BPD behavior is intuitive.
Before we can help someone else though, we have to get better at managing and coping with our own emotions. I hope you share more about your situation and experiences as we all work together to understand and improve the ways we cope and interact with our loved ones.
Again, welcome.