Welcome Theresa4664!
I am glad that you've discovered our online family! You will find lots of support here from members who understand what you have gone through. You'll also discover a wealth of information to read that can be very helpful as you discover more about BPD.
My mom was also an uBPD, and I recently discovered she was also NPD. it's quite a difficult combination no matter how you look at it. The more you read about BPD, the more you will discover that they will not be changed. You need to do what you can to educate yourself so that you can begin to take care of yourself and step away from her perceptions and projections of who she says you are.
Here are a couple of links the may provide some helpful places to start.
https://bpdfamily.com/content/emotional-blackmail-fear-obligation-and-guilt-fog https://bpdfamily.com/content/karpman-drama-triangleHow did you first discover that your mom maybe a borderline?
Wools