It's so hard to reply without coming off as presumptuous and ignorant of your situation, so I apologize in advance. These kinds of feelings can of course be a sign of burnout that can get better with the suggestions in the article plus some significant time off that doesn't come with the penalty of having to make up for all the time off.

On the other hand, maybe it's time to reexamine when you can retire. There are a lot of forums about this, my wife 'rescued' me from feeling like I needed to work to normal retirement age after reading a lot of Mr. Money Mustache, FWIW.