She had some brain scans done that came back as normal but I'm not sure if she was tested for anything else. She had some extended family (uncle and two cousins...huge family) that had some mental health issues but not specifically schizophrenia I think.

I've just not heard of something so specific as a tremor in a hand and then the noises/voices happening but then it goes away in a few hours or at most a few days. This happens (to my knowledge...she may be diminishing it) only a few times a year. (Without medication) That's why the diagnosis seems so heavy.