It was dumb to try, but it worked out. I went after the 3x3 workout again and managed. Still that very last rep getting me. Probably would have gotten it if I had waited a day. I'm not used to ever having really really negative TSB. Pretty sure I tasted copper during the 3rd rep on the first set.
I just really wanted to do an "every other day" pattern this week for M/W/F for the hard workouts instead of relying on a weekend day. It's easy to fit in a hard 40 to 45min workout into my lunch periods during the week.
Now, I hope there's one of those cookies left in the kitchen for my afternoon coffee!!!! Or my covfefe.