I'm incredibly young for this arena, and I don't have much experience to share, but I have some thoughts.
I mean, there are so many harsh, negative things about having BPD. It often takes over and turns life upside down, but I believe we can be wonderful parents. The sensitivity we typically contain can be used as a beautiful nesting and maternal tool.

I think therapy before conceiving or if it's a surprise, then throughout the pregnancy and early years would be the greatest help to BPD mothers.
A lot of us have similar issues, and I know I still resent my mother for ignoring me all my life and making my hurt and my pain about her.
The advantage you have here is intense emotional experience, you have been through harsh times, and you have learned from that. You can empathize; that is something every mother wants to be able to do.

I don't have my own children, but I take an enormous part in raising my nieces. it is a big responsibility and often stressful. But I breathe and tell myself I won't let them witness intense anger and resentment. I won't ignore them. But I won't be a soft touch. I will make them loved, nurtured. I will be attentive and kind. I will teach, but most importantly listen.

I hope this doesn't sound silly or anything. And I hope you find something in there that will give you a different perspective on this.

Would you ever consider having children?