Any ideas? He wakes up and screams anything from half an hour to 45 mins after he's gone to bed at 7. Sometimes we can re-settle him, a few times he's been wide awake again and we've ended up getting him up again for an hour until he's sleepy again. It's only been the last week or so, and it's the only time of day he does this - daytime naps he wakes up and gurgles to himself for a bit and other times at night and in the morning he's not screaming. It's making me tense st bedtime which can't be helping