Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
I advise you (and your lady friend) get appointments for a full battery of tests including serum, urine, and likely brain imaging studies. It sounds as if you could be suffering from the early stages of some type of cognitive dysfunction such as Alzheimer's
dementia, however, this can only be diagnosed after making sure that you have no reversible causes for mental in capacities such as
thyroid or other glandular abnormalities,
Vitamin B12, Vit. D, electrolyte, or infectious types of disturbances. Seek out a
neurologist who is interested in performing a comprehensive set of studies and analyses before coming up with a diagnosis. Don't just accept taking some pill, nothing better than exercising the brain to gain prowess and strength in the neurons and electrical circuitry.
Hope I have answered your query.
Let me know if I can assist you further.