lovely 19 week baby, slept like an um, baby until now, suddenly waking all hours of night AND refusing daytime naps. Nothing much has changed I don't think, in terms of routine - what could be causing this? He was sleeping 10 until 7am, then we dropped the 10pm feed and he was fine 7-7 for a while until suddenly two days ago - kaboom. Last night he was wide awake for about 3 hours between 2 and 5am and he's just started yelling again now - not his usual thing at all. anyone any ideas?