My psychotherapist.

I only saw a psychiatrist a while to suss out the right meds. He wasn't really interested in diagnosing me in detail, because I'm in private psychotherapy, and he was NHS. I've since been discharged by the psychiatrist [mutual agreement].
The closest the psychiatrist seemed to get was saying I had 'depression, anxiety, panic attacks and other problems due to things that happened to me in my past'. I wanna see my medical records. Even then he didn't know the full story of all that has happened to me.
My therapist has diagnosed me with, and treats me according to, Complex PTSD.