Colloquialisms aside, I just made a horrible mistake.
Generally, I do my own version control. When I’m working on Fangs Again, Chapter 4, I number my revisions FA04r1, FA04r2, and so on. So, yesterday, I took a ton of notes on FA04r2, applied them to FA04r1, and then threw them away. After forty minutes with Word’s document compare function, I think I got everything sorted out, but if there are still horrible errors, I won’t be surprised.
My first mistake was throwing away my notes, which I could have re-applied to FA04r2 in less time, but the reason for that is a story for anther time.