Welcome to Personality Place. I don't have HPD but was diagnosed with Personality Disorder Not Otherwise Specified several years ago and thought more than 20 years ago that a PD might explain the continuing dysthymia I was having then. Long story, I've written elsewhere on PC, won't repeat it here.
Are you continuing with a therapist you have seen before or consulting a specialist in personality disorders? There's been some progress in recent years in recognizing personality disorders but good treatment, as you probably know, can sometimes still be hard to find. It's not easy, still what are the options?
I'm pretty sure that I would have qualified for OCPD 20 years ago, if they were diagnosing PD's much then, and most people with that are men. And I've been in a general mental health support group with a man who has had some long standing mental health issues and I'm pretty sure he may have HPD -- but the group doesn't talk about diagnoses, he isn't in therapy, so I don't know for sure.
Wishing you the best.