There are a lot of ways to get it. It could be genetic, or you can get it from smoking marijuana
Schizophrenic.
There is evidence that mice and other rodents can show symptoms similar to the anxiety-related mental health disorders you have listed in humans. However, this is uncommon in normal pet mice; the more likely explanation is that either the mouse is acting normal for itself (it may just be a very active mouse) or the mouse may have a disease such as an infection or a tumor.
The early signs of schizophrenia include deterioration of personal hygiene, forgetfulness, depression, inability to express sadness or joy, inappropriate laughter or crying, social withdrawal, oversleeping or insomnia and developing irrational suspicions. Schizophrenia is often confused with multiple/split personality disorder but they are two very different conditions and schizophrenia is far more common. Schizophrenia is not the development of multiple personalities but, rather, becoming split off from reality.