Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
The common reasons for forgetfulness at age 45 are
She should be assesed by a psychiatrist
who can examine her for depression. Depression ver commonly presents with forgetfulness and can be treated very easily with meds.
The other possibility is dementia. There are good drugs for dementia as well like donepezil
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.