A Working Sabbatical

Is a working sabbatical an oxymoron? Am I out of my mind for agreeing to do anything including preaching which I love and writing a book that is practically writing itself? Right now I don't want to do anything but sleep and eat. And I need to exercise. Don't get me wrong, I have been resting and engaging in copious amounts of self care. I have been having lovely comforting, soothing prayer time. I'm even watching lots of tv. But right now I am exhausted. Weary. And I don't know why. And I'm getting a good night's sleep every night. Now I'm just breathing. One breath at a time. And then another...