after getting lots of support on epic threads passim, we think dd2 has been chronically overtired.
having watched her like a hawk, she shows really very few tired signs - no yawning, rubbing eyes, 1000 yard stare that others mention. so we're looking to the clock as well as watching her. i reckon she can only stay awake for about an hour - even at 14+ weeks. i'm just interested to find out what others' experiences are, as people keep mentioning 2 hours?????!