Taking her age into consideration and h/o schizophrenia
Age related cognitive decline( possibly dementia)which is further may be exaggerated by
Chronic schizophrenia itself will cause cognitive decline which combined causes problems with memory and depression.
She seems to have mood lability . Crying for no reason, can’t make sense of things , talking to self.
Is it a new occurrence , crying? Or has it been on and off.
Medication dose review or addition of medication will be useful
Next Steps
Needs cognitive assessment ( memory test)
and medications review
Health Tips
Consult a psychiatrist