Anyone else find it extra frustrating when their child is super fussy and it isn't supposed to be a Wonder Week?

I'm not actively tracking them, but I have the ap, and for most of the first year it correlated really well with his fussy periods. Then this last one it seemed super mild and I thought we just caught a break. Nope. Starting basically right when it was supposed to end he's had all the classic signs--fussiness, clinginess, crappy sleep. Sigh. I know the timing doesn't really matter, but I guess it just makes me more worried it'll go on indefinitely and be a more long-term phase.

Also I'm right in the middle of grad school finals, so the timing isn't exactly ideal...