Ask HN: Am I experiencing burn-out or just getting too old

I am currently at a place where thinking about doing anything on the computer is making me anxious. Over the last two months I’ve worked for maybe 5 days in total (recovering from Covid, taking vacation days). I am at a senior dev position with the highest salary amongst devs, yet lately I do not contribute and it is very noticeable. I have zero will or passion to work. Am I getting too old (44)? Am I experiencing burn out? What is the way out?