I can relate to the part of your problem with not remembering the words and thinking of them later. The frustrating part is you know the word is there somewhere. I also stop half way through a sentence because I forget what I was saying.

I don't know about the last part. My Mom has that problem but unlike you, she had a stroke. When she says we are having elephant for dinner we show up anyway.

I wish I had some helpful information for you. You know we probably aggravate the problem trying to overcome it. That little tid-bit of information is of absolutely no value at all.