DS has been fairly easy to put to bed for months now, we would put him in his cot awake, check in on him a couple of times, and then he'd be asleep.
For the past week, when bedtime has come round, older DD has got her pyjamas on, he sees her and knows that bedtime is nearly here. And he screams, hysterically. For maybe an hour or two. He is tired, its obvious, but fighting the sleep like mad. I end up rocking him in my arms for an hour or two until he falls asleep.
Any ideas how to deal with this? I know we can't cuddle him to sleep every night, he has to learn to go to bed. I just can't understand how he was fine until a few days ago but has now reverted to being like a newborn.