As a fellow traveler also diagnosed as BP after the birth of my son, I can relate. I also was told never to stop the antidepressants, mood stabilizers, beta-blockers, and so forth. After 20 years on those pills, I did some research into the self-perpetuating cycles of psych meds which led me to taper down and off over 1 1/2 years. (Never ever quit fast.)
That is when I discovered the underlying causes: Babesia, Lyme, Bartonella, all tick-borne diseases. The last one has the most symptoms resembling DSM- style BP.