Do you have BPD? The answer is already a NO according to your T, who unlike that jackass cop truly is a professional (and your T also knows you whereas the cop took someone's side of the story before proper investigation AND overstepped his boundaries). That pork grinder doesn't know you and it doesn't matter. He said something incredibly insensitive and outside of professional boundaries for someone who claimed to be a former T.

I feel like being an actor is risky too. Does that mean I have BPD?
I also do not know what I want to do "when I grow up". Do I have BPD?
I am also invalidated by my family. Do I have BPD?

EVERYONE has traits of various things. Nothing is "pure". Having traits of a disorder doesn't mean you are evil, bad, dysfunctional, or whatever.

STAY AWAY from your sister. No reason to talk to her since all she does it put you down.

I have depressive traits. I have OCD traits too. Even so, I function and I don't feel like I am bad or weak or incapable or whatever.

STAY AWAY from the ex bf. He is no good at all. Don't feel too bad about losing that one. Plenty of fish in the sea and maybe a break from dating until you get yourself in a more healthy place yah?