“You cannot imagine the craving for rest that I feel—a hunger and thirst. For six long days, since my work was done, my mind has been a whirlpool, swift, unprogressive and incessant, a torrent of thoughts leading nowhere, spinning round swift and steady”
― H.G. Wells, When the Sleeper Wakes <p)
And the nights can be even worse. But then you see a picture of fox sleeping on a bus and it is all okay. Work when you work, rest when you rest and play when you play; it will come out well in the end.