Well that didn't take long.
I was supposed to go out tonight. Instead, I went home, had a nap, and woke up around half an hour ago — just in time to go to bed properly.
So no knitting tonight, but I think I did the right thing by staying in and taking care. There will be even less getting done if burnout occurs.
I did get some mental knitting done at lunch today — I'm pretty sure I have the rows figured out to get the double knitted jacket done without running out of yarn.