This is just a suggestion and maybe you are already doing this.
When all the other selves decided to make themselves known to me was a scary, facinating, confusing time.
I started writing things down, a journal. A very intersting thing started to happen, I was letting myself write down what ever came in my head. Suddenly it dawned me how different some of the hand writing was. My other selves were communicating. Having their say. They also expressed themselves when I would, I guess you could call it doodling. Sometimes all I did was sort let my hand relax and just move the marker aroung on the page. Then color inside the spaces. A lot of interesting images came up that way, some I never did understand. It has taken a few years to get cooperation and hopefully getting together for the good of all. I believe the writing and the doodling was a good start down our road to some kind of healing.