My 8week old DD has been quite random with her sleep during the night, last week going 6 hours this week waking at 430 for a feed then back down until 9 which I know is good but today she went down at 12 woke up at 6 so I changed her anticipating her to want a bottle but she's gone back to sleep! During the day this never happens and I'm wondering if this is normal? Should I just leave her sleeping as she's obviously not hungry? Confused!!