There is a good book titled, "Share My Lonesome Valley" that is helpful to those providing care for the elderly, spouses, children, etc with long term illnesses. Caregivers are one of the most overlooked groups when it comes to support. My heart goes out to you. We are just in the very early stages of my wife's recent diagnosis of early onset dementia. Most would never realize it in her but I see it every day. It sometimes takes a great deal of patience when I tell her the same thing several times. She is sweet about it and realizes what's happening. Right now she can still function with me being gone for two weeks at a time. She can drive, manage her meds, shop for groceries, cook, etc. Right now it's just the little stuff but it will get worse. She has to keep lists and instructions for a lot of stuff.
I'll keep you lifted up in prayer.
