Sleep Regression?!


Okay so I have a great sleeper, bedtime is 7 and sleeps 12 hours a night and we’ve NEVER had any issues. Up until 3 nights ago he refuses to sleep in his crib, I’ll let him cry it out but nothing happens so I bring him to our bed and he falls asleep almost instantly. I move him back to the crib and he sleeps all night. Well tonight we moved him back and he woke up and would not go back to sleep. I heard it could be separation anxiety but I don’t know what to do! Help me!!!