Why?!?!

Suddenly my boy wants to be nursed to sleep for naps?! He has NEVER nursed to sleep. He is such a quick eater he is done in 5 minutes, nursing to sleep just never worked for us, and I was pretty happy with that. He has been falling asleep INDEPENDENTLY, in his crib, for at least a solid month!! Nights are still good. I thought he was starting to drop his fourth nap, but now idk because he’s been cranky all week and I just put him down for a second nap even though he’d only been up an hour—he usually goes 2 hours awake. I don’t want to start a bad habit! But I want him to get enough rest! Don’t want to CIO. Any ideas?? Could it be teething? We moved houses—and states—on Monday. Is it that? Helllllllllllppppp.