I had an auditory and visual hallucination (each their own) going on earlier this year, but it was only under extreme distress and went away after being on Seroquel for a while. Not on SQ for 2 months now but still they haven't returned. It was a male hateful voice and a dark shape trying to kill me that were tormenting me. Sorry if this is triggering, just saying I'm bipolar and I relate. Not BPD though. You know they say there's a gene shared by both bipolar and schizophrenic people, so it doesn't surprise me that we can hallucinate during high or low or mixed episodes.