my dear A....
wow it breaks my heart to read those words....that's the first thing that happened, I so badly want you to be unafraid and ok about this sudden change in direction.
damn it I am way out of my depth!...I don't know the specifics for a histrionic personality recovery....and as you say, the characteristics that define you as such are the things that add quality to your life...despite some dysfunction. but don't all people on earth have dysfunction?...sure they do!!
Certainly there are unhelpfull elements of this hpd that can be addressed over time A....and it must for sure be a total shock to be confronted by unknown challenges.
judging by the few that are in this forum then you are a very rare creature indeed....I see a beautiful and exotic creature...wild and charismatic, alive with personal energy!...I expect it may not be about a "recovery"....not for you...but perhaps something more like a
re-callibration of yourself...finding ways to capitalise on these wonderful qualities.....so that the other items you mentioned there perhaps won't affect you or the people you love, in ways that end up hurting you back. James is just guessing here A...forgive me. I care deeply for you.

I must do some research so I can better understand the little details, thats the second thing that happened.
..I am here for you A, to share the fear. yep.
enourmous hugs..James xxxxoooo