am so sorry to hear that Kitty. My Mom had Alzheimer's Disease since she was 59 years old. It was called back then, Pre-Senile Dementia of the Alzheimer's type. I said to her Neuro "What the heck is that?"
It was because she was so young to acquire it.

What a shame. She was healthy as a horse (pardon my expression) but her mind was disappearing. Her first MRI showed a shrunken brain.
Her Neuro showed me the films. I still have them. My Dad had just passed away of a heart attack and within six months she got that disease. She was so stressed out. She even forgot their 40 years of marriage.
I took care of her for 10 years at home with some adult day care and help from my DH and children, because I worked. Then I had to put her in a Convalescent Center because she knew no one at all, and needed 24/7 care.
My Neuro said I should have done it years before. She lived to 84 years old. They took excellent care of her. I visited often. It was so sad so I know how it was Kitty. Tragic.