Bh bh bh today went better with the sitter. He didn't seem thrilled to be dropped off and he was again crying when I picked him up, but the sitter said he had just started crying as I came - impatience for me to pick him up I guess? He does that at home sometimes too - and I have no reason not to believe her. His eyes weren't red and teary like yesterday. She said he had a good nap and he ate a jar of baby food. Again he nursed and fell asleep not long after we got home. Still pretty fussy and needy at home but less sad than yesterday.
So I still don't know what's going on but I have hope. Yesterday I was really worried because it was turning into a 2 week streak of hard days at the sitter.