OMG, some people need to get a grip. She's only 6weeks old for heaven's sake, you have months and years to get her into a routine (if that's what you want). My DS1 didn't have a bedtime until 2.5, and we all survived! And it's still not a strictly enforced bedtime either - if he has a late day sleep, he goes to bed later, if he has no day sleep he goes to bed earlier.

Hun, chill out, and follow your little girl's lead. You might find that in another 6 weeks she seems ready to settle into a routine, or you might find that it takes another 6 months (not that I mean she'll still be going to bed at 11pm in 6 months ). And stuff what everyone else says, you're her mum, you know her best