E has been sleeping through the night since I stopped breast feeding him at 8 mths. We have story time in our bedroom at 18:45 then bed at 19:00 in his room, lights out, good night and he goes straight to sleep. For the past 10 nights he has screamed when I leave the room, I have tried controlled crying but each time I go in to settle him he gets more upset when I leave. I have also tried leaving him without going in, but he gets hysterical and then doesn't settle at all for hrs. We thought that maybe he has become unsettled by the thought of father Christmas. He is a very happy and active 2 yr old during the day and this whole experience is not only very upsetting for both myself and my husband but for E too. Any ideas or suggestions would be warmly welcomed, thanking you in advance