17 mth DS used to be a good sleeper. He always goes down around 7-7.30pm and used to sleep thru till around 7am. But past few weeks he's been very ill with a bad cold and was getting up at 5am. We would give milk and maybe get another hour or so before he would have to come ito bed with us so we could get some peace. He's much better now, but is still waking at 5 and it's driving us mad!!! Any tips to get him back to his routine? We've tried letting him cry but it gets worse and worse until we have to go in. Help us please!!!