What Happened?

We've never had a problem getting Benjamin to go to sleep, even since he was just a few weeks old. He's even been known to take us by the hand and lead us to his crib so we'll put him in his crib. We've been so blessed in the "sleep" area with him. However, I'm not sure what's going on but as of the last week nap time and night time have been dreadful. He'll cry and scream at the top of his lungs for what seems like an eternity. It's completely heart breaking, especially when he calls specifically for one us. After a little while if he's still screaming either David or I will try to comfort him. He'll even fall asleep on us and as soon as we put him back in the crib he'll start screaming again. It's kind of a "scared" scream so we starting using a night light in his room hoping that would help. Didn't work at all. There's a part of me that thinks he might be sensing the changes that are about to happen next week..............possibly?