My dd2 is 8 weeks old. During the night I have to wake her for nappy changes and feeds. I honestly think she might sleep through if I left her. She's a high percentile baby, does not soil her nappy in the night just wets. Is it OK at 8 weeks to leave her sleep from 11:30pm until 7:30am? Never had this with dd1 she was and still a nightmare at night.