Hi chasms, no one on here can diagnose you but your symptoms are similar to those with Schizoaffective Disorder.

I am Schizoaffective Bipolar Type, I've had psychotic symptoms both in and outside of my mood disorder. The difference is when I'm not manic or depressed I'm not suicidal or not staying up for days in a row with other mania symptoms.

It seems like a tricky disorder to diagnose, it took awhile for my doctor to give me this diagnosis. First it was just Bipolar Type 1 for quite awhile.

I no longer have symptoms because I'm on medication that has helped tremendously:
Invega Sustenna (monthly injections)

Be honest with your doctor and get the help you need

EDIT: I just saw you said you have bpd, so the manic stuff I wrote about may not apply to you.