Dear Sylvia
I am sorry to read about Dhiren and can imagine your concerns and worries. The decline in speech makes it so much more difficult. I had a somewhat similar experience on Saturday, something causing Henry anxiety but his speech so poor I couldn't identify what it was, could only try to sooth and reassure him.
You can only wait and see... and may well find that this does pass. Yes progression is inevitable, and Henry's has been significant. Yet even with progression his 'mood changes' can be up and down like a yo-yo.
Times when he has something on his mind, is upset, but can't articulate it. Then after a week or two he settles again, is relaxed and content.
It is true that ' the only predictabe thing about dementia is its unpredictability.'
I realise none of this will help, Sylvia, your concerns, worries will continue, as mine do with changes. I just hope that Dhiren's present mood does swing back again and he becomes more settled.
Loo xx