I'm a shift worker with days off scattered throughout the week, and, after having to get up for the day job the last three days, I am now awake way too early on my day off.
Of course book anxiety doesn't help. My brain just constantly wants to know how things are going. In fact I think the only time the book anxiety is in check is when I'm working the day job. It's so busy pre-Christmas there's really no time to think.
Even so I'm tired and wish my brain would shut up and let me have a little more sleep.