Okay, so some back story; my mother is diagnosed with both bipolar type 2, and borderline personality disorder. For a long time, she was the person mainly around in my life, and sometimes I even had to take care of her shit. But I'm also just like her in many ways. Less in her manic sort of tendencies, but more in her BPD-specific symptoms. I've tried to explain this to doctors before; but because when I'm in a therapy setting I try to remain calm and refrain from crying or being over emotional, it's generally hard to illustrate the behaviors I try to talk about - then I feel like they think my opinion is invalid and I don't know what to say, when I know the way I act is highly indicative of BPD (I have anxiety, so I generally get worked up at this point and would rather avoid it)
I've been diagnostically tested once, but it was when I was much younger (I think somewhere between 13-15, and I'm 19 approaching 20 now) and I've actually changed a lot since then. Not to mention they were more focused on seeing if I had ADHD, and that doctor turned out to be kind of an ass hat and made too many incorrect assumptions about my life.
So, I guess basically I want to know what I should say, to encourage them to do at least SOME sort of testing, because I'm going downhill and my current therapy things for depression and anxiety alone aren't helping as much as they should be. I don't want to be diagnosed just to have it like a trading card, I just genuinely want to figure out what's going on - so that I can get specific information to help myself get better.

The symptoms that I think I've been showing are (from psych central); 

* Frantic efforts to avoid real or imagined abandonment
* Patterns of unstable and intense interpersonal relationships characterized by alternating between extremes of idealization and devaluation 
* Significant and persistent unstable self-image or sense of self 
* Impulsivity related to sex, eating, drugs, &amp; occasionally money 
* Emotional instability
* Persistent suicidal thoughts/feelings
* Mild feelings of emptiness
* Difficulty controlling anger
* Stress-related paranoid thoughts 
These types of behaviors have fluctuated in severity, which has gone up over time as well - but I've been that way ever since I can remember recognizing I was depressed, so around 11-12 years old.