Isn't it funny how we go from worrying about how long our babies sleep to worrying about them sleeping TOO long?? lol
I would NEVER wake a sleeping baby at night, in the day, i will wake hin after 3 hours, just so he will sleep at night.
I think you should just let her sleep. I was always told not to wake a sleeping baby unless absolutely necessary (ie. losing weight therefore, requires more feedings). If you need to wake her, I think you are better off doing it during the day so your nights are peaceful. Pumping is always an option if you are concerned about your milk supply. You are doing great!!
It is great she is sleeping on her crib already. I think you should let her sleep during the day and wake her up for feeding at night if she sleeps all night don't wake her up, let her sleep.
You can always pump if you worry about your milk supply