My 7 week old DS has no problem staying asleep after his 10p.m.DF but then has difficulty settling after his one night feed (b/w 3 and 4). Sometimes he goes right to sleep and other times it takes an hour to get him back to sleep. He feeds every 3 hours during the day and has one cluster feed before bed. He doesn't sleep more than 2 hours at a time during the day. I don't think it's his day sleep robbing his night sleep. I can't figure it out.