Faye, what you described is exactly what I saw in the months and years leading up to Mom's final diagnosis. She would fidgit and mumble and complain. She got to the point that she didn't want to go out but would complain that she didn't get to. I think she was aware of the changes because she went to extraordinary lengths to get wills, POAs, medical directives in order. She also did major repairs to the house because one day we would need to sell it and she didn't want us to have to deal with the repairs. She was so obcessive about this that she had the outside of the house painted twice in a little over a year and did the wills three times.
When I look back I remember saying her memory was "not that bad" but in reality it was. Is your Mom repeating the same stories to you? Have you double checked what she says with such clarity to find out the reality behind it. Is she using avoidance techniques like saying..."Oh I knew that". They are masters at covering up at first.
If she has been diagnosed, then this is definitely part of the disease. If she has not been diagnosed you might want to get that done to make sure. ALso be aware if she is showing signs of depression. Many times that goes hand in hand with ALZ. That is treatable.
We do hope to hear from you often. This is a difficult journey. I am probably nearing the end of Dad's journey with Vascular Dementia but only in the middle of Mom's. There is nothing like the real life experiences, support, and encouragement that you get here from those that have walked in your shoes. So come back often
In the mean time take one of our towels and hold on to it. It's great for stuffing in your ears when you have just heard enough mumbling