Hallucinations independent/outside mood episodes may be indicative of schizophrenia or schizo-affective disorder. At one point, my pdoc ruled out schizo-affective disorder and schizophrenia. He did rule both out but he said don't stress, the treatment is the same. Check with you pdoc if you are concerned.

I have music going in my head 24/7 and I don't consider it a hallucination. For me, I consider hallucinations to be serious delusions or major hallucinations (of any type and persistent). Voices aren't a good sign concerning. Especially command hallucinations. I think I hallucinate regularly but I've learned to ignore the mild, pesky ones.