Hi Foggy and welcome to NeuroTalk!

My Mom had dementia and then Alzheimer's. She was in her 70's when she developed it. What you described just doesn't sound like either to me - based on what I remember from my Mom's behavior - but I know everyone is different.

I'm wondering if it might be some damage caused by the concussions that's just surfacing or causing noticeable symptoms. I'm sure the doctors will investigate that possibility.

Cindy had a great suggestion - keeping track of everything in writing is invaluable. I do it all the time because I just don't trust my memory especially if I'm not feeling well.