Multiple Personalities Support Group
Dissociative identity disorder is a diagnosis described as the existence in an individual of two or more distinct identities or personalities, each with its own pattern of perceiving and interacting with the environment. At least two of these personalities are considered to routinely take control of the individual's behavior, and there is also some associated memory loss,...

But if your therapist went to this conference and they said sometimes DID can include external voices, I'd go with your therapist. It's important that you trust her.
(btw.... hi lou...long time no see. Good to see you again)