DD is now 5 weeks old. She started to get into a sleeping routine waking every 2.5-3hrs for feeds but the last 4 days she has fed constantly from midafternoon to 2-3am, then go 2 hrly until the morning. She put on 9 onz last week so I'm assuming my breast milk is ok. How long does this tend to last. She is also much more awake in the day so I was hoping she would sleep more at night.