My baby boy is nearly three weeks old and he sleeps allllllll day and then is awake half the night....what can I do to keep him awake during the day....I've tried everything...including taking his clothes off....then he just gets mad and wants to nurse...even though he just finished a good feed only 1 hour before...if I feed him to settle him, he gets an umpset tummy from over eating and ends up spitting up a lot....I don't k now what to do! HELP!