Bedtime question - and night sleep

CA2006

Right now, DD (4 weeks) is in an eat, wake, sleep routine. Occasionally, she will fall asleep while nursing and I let her sleep when she does. She has always been good about waking, nursing then back to sleep overnight. We currently put her in PJs, swaddle, feed whenever she wakes around 9-10pm...sometimes as late as 11pm. At what point does this become too late?

since she will nurse and go right back down between the time we "officially" put her to bed and wake for the day between 6-7am, I am afraid that if we move up bedtime, we are tempting fate b/c she does so well overnight and really doesn't need 12 consecutive hours overnight. Ideas? Suggestions?