Sorry to hear about the condition of your mother. Old age comes with loads of problems : they may be in the form of medical complications, neurological or psychiatric disorders .
It appears that that paralysis could have been because of some neurological problems and I am sure Radiological examined like MRI would have been done. Also detailed Medical tests must have been done.Hallucinations are not disorders by themselves but as a result of some other underlying disorders .
There for details of the history:Medical,Neurological or Psychiatric evaluation is definitely needed as soon as possible.
Next Steps
Some of the symptoms can be controlled to some extent but a help of a mental health professional is definitely needed.Drugs should be taken under supervision of a professional.
Health Tips
Online consultation is available now a days but as mentioned above…detailed history and investigations are to be done.Zoplcon may help in the problems of sleep but she she will definitely need drugs as per diagnosis of her case.
Early intervention is always recommended.