You could try and take the test on this site called the personality test. I found it helpful because it gave me insights on some issues I didn't not even recognize as issues.

I was able to share the results with a therapist and we were able to use it as a starting point as to what problems I needed to work on.

I found that while it was initially great to have a label and know I'm not alone, I later found the BPD label to be a hindrance as we are often treated differently by therapists and insurance companies.