Feeling slower...

[SWUSA_]

I don't sleep well when I'm worried about something. Also, I can not drink coffee after about 1pm or I do not sleep well. Exercise helps me but it sounds like you are already getting a lot of walking in.

 

[ickihun]

I feel slower when I've been given a new hypertension tablet. It slows me right down, in fact.

 

[Bittern]

Have you considered Apnea. I suffered from it for years before it was diagnosed but within in a week of starting treatment I was packed with energy?