Early in my career, I picked up as much overtime as I could at the hospital. I worked 13 days in a row with three of the those days being 12 hour shifts. My coworkers informed that I was a real bitch after day 7 and it would be better for all of us if I didn’t work more than seven days in a row.
I took their words to heart. There’s working hard to get ahead and then there is killing yourself and making everyone around you miserable.