My DS is 19 weeks and most needs is managing to sleep from 7ish until 4am without needing a feed. At 4am I feed him and he drinks between 3 and 6oz. Never mind how much he drinks, he then wakes up at 5.30am. He won't be re-settled and he isn't hungry till 6.30am. Any ideas how I can push him past 5.30? If he hadn't heen up at 4 it wouldn't feel so bad but I'm not a good sleeper and I can rarely drop back off before about 5.15 so my day is starting at 4.