The important thing to remember too is (if I'm reading your post right), your little one is only 1 wk past her due date, right? So her corrected date is 1 week, yes? My guy was only 2.5 weeks early, but I found for the first 4 weeks or so he was asleep most of the time, save for maybe a diaper change between feeds and, yes, I was also waking him at that point to eat during the day (he was jaundiced). There IS a difference between a routine and a schedule, just as the others have said. You have to watch your little one to know what she wants - and she'll get better at telling you once she gets a little bigger. My little one was screaming tired tonight at 630 tonight so he went to bed after only 3 ozs rather than his usual 8...weird...whereas he's usually up until 730. So what's the point in keeping him up just to fit into a "schedule", right? He was miserable, I was ready to hide under the bed, so he went to sleep!
Good luck with your little gal!