Oh, can relate. Work’s the next day, of course it’s a downer. You spent yesterday catching up on necessary stuff you’d deferred in favor of work for five days straight, so didn’t really have an actual break, and now your momentary breather has another damn work day following it, so you feel like starting anything you actually want to do is pointless. You dread night because you’ll be waking too early to the alarm clock. Yeah, it sucks, there’s a reason some cultures have the attitude that anything short of a week isn’t a real break from work.