This may sound funny, or comical, but seriously... I have accepted my DID like 14 times so far. I know this is other alters accepting the truth. So this may happen to you.

That feeling in the pit of your stomach. It's your protectors. It happens to me too. Yes even as I'm typing this. Push through it. Don't let it control you. But understand they are only trying to protect you. Assure them you are safe.

Do you keep a journal? That is the main way I have communicated to my system that many exist. Otherwise I don't know where I'd be. Locked up in a state institution, probably. Don't get me wrong this journal isn't fool proof, some still deny it.