Yeah, never want to do that again.
So I'll be taking another quiet workday on the sofa with laptop and tea, rather than giving in to the impulse to run all the errands, etc.
All the chore-things (and fun-things) that need doing will still need doing on Wednesday, and be none the worse for the wait. And enforced focus on work (aka the sofa-tether) means I'm going to hit ahead of deadline on the current project. So yay?