Zyle fussy!

Zyle has been fussy for most of last week. He was sleepy, and irritable, and didn't want to eat much. Is this one of the signs we were worried about? Is this an impending syndrome? Or is it simply a reaction to the time change (favorite quote of the week from a parenting blog: "I speak for all parents of small children when I say, 'Time changes suck!'" I couldn't agree more.)? Or is it a growth spurt?

I'm hoping it is a growth spurt, but I'm feeling a bit more validated in our choice to have the surgery done.