Hello @Margaret 1 and firstly welcome to this friendly and supportive forum. There is a wealth of shared experience of dementia to be found here, and members really do want to help.
I am sorry to read about your husband and your concerns about dementia.
This is a great place to reach out and ask questions. I hope you will as there is total understanding here.
Have you thought about trying to get him to a GP to start the ball rolling for a diagnosis. That is normally the first step, then a memory clinic appointment to confirm or otherwise a diagnosis.