My DS will turn 3 in Feb and has been a fantastic sleeper since 7 months. I would put him in the cot, walk out and he'd fall asleep on his own. He is now wanting to sleep in my room or me sleep in his room so he knows someone is there at all times. He wakes in the night screaming to be taken to "mummy's room". Any advice on how to get him back to sleeping independently in his room again???