9 week old long naps

[Oysterbabe]

She's gained enough weight that I don't need to wake her for feeds anymore but should I be letting her nap as long as she wants? Yesterday she slept from 4 - 9. We then woke her up because we were worried. Today she went to sleep about 3 and is still asleep. Should I just be leaving her at this age?
It's only been the last couple of days that she's been so sleepy.
TIA!

I wake mine every 3 hours during the day to feed with the theory being she'll take enough during the day to sleep at night. It would depend how she's doing during the night as to whether I would wake from a nap.

If you aren't bothered about the night and can sleep when she does I don't think there is any reason to wake her!
K