Bedtime suggestions

My little guy was born an awesome sleeper. At 3 weeks he was in his own crib, 6 weeks sleeping through the night and since day 1 he would nurse and fall asleep... He is now 14 weeks exactly. For the past 4 nights, same exact bedtime routine, nurse him and he passes out, when I put him in his crib he screams and screams. It was so unusual that I kept cycling from nursing/crib/screaming until 1am and he finally passed out. The last few nights I'll put him down and he will scream and the second time I just let him scream until he passes out. I really hate doing that to him because it will take 10min or so until he finally goes to sleep. Anyone have any other suggestions?