Thank you for posting your query.
It is possible that you have depression
with anxiety after your mother's death. These could lead to confusion and memory lapses. It need not be Alzheimer's disease, based on your symptoms.
You require an evaluation by a psychiatrist
as well as a neurologist
to determine the underlying cause for your symptoms.
A CT scan of brain, vitamin B12
level, and thyroid profile may be helpful too.
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist