I used to be so adamant about the fact that I have BPD. I would tell people I have it, even told my therapist that I used to have(about 2 years ago) that I thought I had it. My symptoms seemed to clearly match up with people that have  BPD. 

In my head, if my symptoms and behaviors are so similar to that of a person with a mental illness, why wouldn't I have that mental illness?

Then a reddit thread about ADHD showed up. It outlined certain behaviors that were strangely similar to those I thought were aligned with BPD, and put names to them. 

Things like, "Fear of Rejection" and "Depression" were listed in there(unless my memory is wrong, good chance) 

In the end, as nice as it would be to get an answer. It does not matter what the label is. At the end of the day, what does a label matter when you just want to die?