What will happen, at the end of the three years?
He has been tested twice by a psychiatrist, and he went form Mild Cognitive Impairment to Advanced Mild Cognitive Impairment in a year. The neurologist says that it is only "test results". He is on Donepezil HCL 10 mg. We are looking at clinical testing now.
Sigh.
The neurologist may be correct that within three years most cases like this have a resolved diagnosis, but no one has a crystal ball to say for sure where your husband will be in three years.
What you can do today and tomorrow and three years from now and six years from now is to work on managing the symptoms, whatever they are, and ensuring the best quality of life possible.
See a lawyer, and protect your assets in case the diagnosis happens. But if you don't have a fortune, spend some of your nest egg now on some fun. The NH will get whatever is left, so do a little sensible splurging now.
I don't know about you, but I knew my husband had ALZ before his first testing, 5 years before his diagnosis. Work now on loving and understanding him, and noticing his love for you. (I had to dig a little deep to find it, so I did.) Having a better relationship will make it easier for you to care for him when he's no longer all there.