My latest doc has mentioned the same to me; I might have borderline personality disorder. This is the second doctor that has mentioned it. Along with the myriad other diagnoses, including once schizophrenia. I've done some reading on BPD, but I'm still a bit lost on it. I think that sometimes people's mental health does change, but I also think understanding yourself and your symptoms, which sometimes occurs over years, allows a more accurate educated guess.