There is a syndrome whereby people who go out to work get sick when they go on holiday, exhaustion is your body winding down from a constant state of alertness, people experience this when they first retire! Break your work day up into 60 minute slots, set a timer, every 60 minutes go out your door, or stick your head out the window, make a cuppa, text a friend, you will find life easier in 60 minute slots, love to you