So a 17-hour fast (I was aiming for 16.) Finished my lunch around 1:00 yesterday, and broke my fast around 6:30 this morning.
I drank a couple cups of hot water in the evening, and I got up to pee after every damn sleep cycle. Four times, I think. I don’t know if it was hunger, or a revved metabolism, or the extra water, or the combination: but anyway, it was not a great-quality sleep. NB I did have one of those really deep naps yesterday afternoon, so that’s a possible factor. Also recollect that carb bomb of the birthday croissant and two enormous cookies. That probably destabilized my blood sugar a bit.
The hunger really does come and go. It doesn’t just ramp up and up. And I wasn’t all that hungry when I woke up to pee: certainly not so hungry as to make it especially difficult to get back to sleep. A really interesting thing was that when I when I got up in the morning, and was on the verge of breakfast -- breakfast was within sight -- the hunger vanished. A lot of it apparently consisted of anxiety about whether I would be able to do the fast, and whether fasting meant I would never get to eat again. I could easily have dawdled another hour before getting breakfast. (I did in fact take my first walk before I ate.)
At no point was I anywhere near as desperately hungry as I used to be -- multiple times a day -- when I was fat. No cravings.