I did, but I never tried to get published. Writing unblocks parts of my mind and I gain access to truths I don't know I hold. For me, it is a very powerful tool in my healing process. That's why I am here !
The only thing I can say about a BPD mother reading what you write is from my own experience. I wrote something as a child, a small book, for school. I was 10 and it was called : as mother, as daughter (telle mère, telle fille).
The story went : mother abandons child because she considers her a monster (the child is diformed). Child meets a friend in the orphanage. Friend uses magic, and exchange her own beauty to make the main character "finally beautiful". Later on, the protagonist meets love, but the mother somehow realizes the beautiful new protagonist is in truth the ugly baby she had abandoned and tries to kill her. Until at the end of the book, the boyfriend kills the mother.
I mean.. that's some very deep Freudian sh*t right there. I was 9.
She was completely oblivious to it. We talked about it again and she doesn't even remember it. She kept it a long time actually and ended up losing it. I wish I had taken it with me, but I didn't.
Anyway... Change the names and she might not even realize you are talking about you and her... And if she does, bringing it up would be, in sort, an admission of guilt, so I don't think she would...
My thoughts on it anyway.