Hi. Just a little imput from my own years "on the couch."

In order for my T to find out more about me, she regressed me. Come to find out, I'd been traumatized at ages 3, 8 and as a teenager. I could see myself at these ages. Since I didn't have DID, my T was very careful to "re-integrate" me after the sessions. At the end of the regression therapy, she asked me to see the "core" me. I could actually see me at the different ages becoming one with "the adult" me.
Actually, I believe that all these people you feel you are, are all a part of the "core" you, just different facets of your Self.
It would be a good idea to discuss this with your T. It might not be as bad as you think it is after some explanation.
Good luck!
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.