thank you for your query. from the description given by you, the symptoms appear to be that of a
Psychotic disorder. In psychosis, there mat be symptoms like hearing voices not heard by others (auditory hallucinations), seeing things, faces, shadows not seen by others (visual hallucinations or imagery),extreme mood swings (affect regulation difficulty), wanting to be left alone (asocialisation), sleep problems(insomnia), refusal to eat and poor self care (apathy). Sometimes she may also act out to her hallucinations (like screaming).
Now a psychotic disorder may be due to Schizophrenia, or
Bipolar disorder,Mania with Psychosis, or
major Depressive Disorder with Psychosis.
though the young age of onset in this case point towards schizophrenia, a detailed history taking,
Mental status examination and evaluation is required to confirm the diagnosis.
After diagnosis is confirmed, she would require prompt and adequate treatent with antipsychotics and or mood stabilisers etc. please remember, the earlier the treatment started, better the prognosis for these conditions.
i would suggest you to
consult a psychiatrist as soon as possible for the same.
hope i've answered your query. please feel free to contact me fror any further clarifications. best of luck.