This is where I was a couple of months ago, and Sybil was the first thing I thought, too. That's never how did works, apparently, and that movie has done a lot of damage. You described how I experience my other selves, too, and I swore those vicious arguments in my head were just unusual self talk. In a way, they are, because all of my parts are me, aren't they? But it's also, maybe, did.

I'm still blindly navigating this, so I hope folks who are further down the road can offer more insight.

Hugs.