I have DID and hear voices all the time, always have. I do have a screaming voice , one of the alters, and lots of kids voices. But for me it isnt frightening as we are all friends and talk to each other all the time.
I remember when our former core person was in college she thought she was schizophrenic because of the voices, so i umderstand your fears. Definitely talk about it to your support people..