Sounds like the other commenter got it. I’m commenting because the only time I’ve ever posted about a book o couldn’t remember was “The Dark Lord of Derkholm” also by Diana Wynn Jones! Great book of you haven’t read it. She wrote Howell’s Moving Castle too.

Drink more water! Whenever I find myself grumpy, the culprit is usually dehydration… It makes everything harder IMO. Ymmv etc etc anecdata

I second this. I have one small cup of strong black coffee in the morning since that’s all I can take, and then I switch to a thermos of hot loose leaf mint tea – probably 4 cups a day or more. It’s just so much more interesting than water, and helps keep things settled