I have been diagnosed with depression, OCD and BPD, and what I can say from personal experience is that I don't exhibit all of the symptoms of any one of them. I have other diagnoses as well; I am a 'melting pot' or mosaic of mental health issues. In my case though, I feel that by the time I was diagnosed my BPD was far less of a problem than the other stuff. My suggestion would be not to worry too much about it (I know that probably sounds incredible) and just seek help for what you are experiencing now, which sounds like a few things. Fortunately the common treatment for BPD - DBT - addresses all sorts of things so it's useful for all sorts of people.