There are some Dr's that fall behind the progress made in their own discipline. It is one thing to say "you don't have it" and another to say "it don't exist". If your psychiatrist doesn't believe that Dissociative Disorder exist he will never be able to "see anyone with it" Sometimes as we grow in therapy the therapist or psychiatrist don't grow with us. I found that psychiatrists are good for prescribing medication but psychologist are better at one on one therapy. That's been my experience. I hope you can find a therapist that will hear you and work with you.