Ok, he's acting better today. He pooped 3 times before noon and didn't go at all yesterday (I'm not sure about the day before.) Could constipation have caused this?
I mean, he's very strong willed and challenging most of the time, but he was way, way, WAY worse than normal on Friday. I would have guessed he was sick except he wasn't. Maybe his tummy hurt?
He has good days and bad days, but his bad days weren't usually as bad as Friday.
Anyway, I'm feeling slightly less freaked out today and more hopeful it might be age appropriate frustrating behavior.