Darragh is six weeks old and since he was born he wakes every 3-4 hours for a feed at night - last night he went to sleep at 7 and I thought he would be up at 10 or 11 for a feed but he slept right through until 3 am when I woke him because I was worried about him - a full 8 hours is this normal ?? now he didnt sleep much yesterday was just awake most of the day but not unsettled or crying at all.