My 13 mth ds has gone from being a model baby to a monster almost overnight.He has always gone to bed awake and mostly slept through the night, he always woke early between 5 + 6 but i could cope with this as he used to have 2 good naps through the day and I too would have a nap at the same time.For the last week or so he screams hysterically as soon as he is put in his cot even though he is tired,even if he falls asleep on me he starts to scream as soon as i put him in his cot.I have tried leaving him to cry but he just wont stop,I am exhausted and just dont know what to do please help.