hi, bluebay
I'm sorry you had a bad experience there. Have you been diagnosed bipolar by a psychiatrist? What meds are you currently on?
One reason they may have said that about BPD is that most of us BPs are also borderline personality. I don't really know why, but it seems that many BPs have abusive childhoods and develop the abnormal fear of abandonment aka borderline personality disorder. It is not a disease, but a personality disorder, and unfortunately, there is no medication for it.
Let us know how you got diagnosed BP, what happened, whatever you want to share.