Hate crib and sleep all of a sudden?

Jillian

Anyone else’s kids all of a sudden hate HATE hate their crib and going to sleep? Ours has the past week and it’s hell. Takes half an hour for him to cry it out and then he won’t stay asleep. Two night he’s woken up for 3-4 hours and I can not get him to sleep. Any tips or tricks? Is it just a phase? He’s always been such a good sleeper