My son is nearly 18 months old and is waking a couple of times a night. Around 2am he will not go back to sleep and screams mummy until I get him and bring him into our bed. He had just started sleeping through the night before Easter and then he became ill. He was ill on and off for about 6 weeks and will not revert back to sleeping through the night. We have left him to cry for 20 minutes on one of the mornings to see if he would go back to sleep. This didn`t work. Can you suggest anything else to try as I would love to start sleeping through the night again.