Hello cherrya: I believe this is your first posted thread here on PC. So... welcome to Psych Central.

I'm sorry I cannot address your concerns related to BPD & hearing voices. I at least also could not find any articles, in Psych Central's archives, that talk about hearing voices as a symptom of BPD. Perhaps there will be some other members who will have had some experiences with this they can share.
In the meantime, here are links to 4 of the articles, in Psych Central's archives, that discuss BPD the first by our host Dr. John Grohol, Psy.D. The fifth link is to a BPD-related blog here on PC:
Characteristics of Borderline Personality Disorder
Living with Borderline Personality Disorder
6 Gifts of Borderline Personality Disorder
Dialectical Behavior Therapy in the Treatment of Borderline Personality Disorder
Therapy Unplugged | A blog about psychotherapy and therapy, by Sonia Neale.
I hope you find PC to be of benefit.