Diandra, maybe I understand a little of what you are experiencing.
This is not about me but when my mother-in-law was in the later stages of dementia she became unable to recognise a photo of her deceased husband. The best that she could come up with was that it was maybe a photo of somebody who she used to know.
My wife found that hard to deal with as did I but we looked to each other for support, which helped. I hope that will work for you as well.