Just a few Q's about a new mom...long sorry

[JBrown]

Hello again!! I have a few more questions about my new mommy rat-(Macy)-- she is acting really strange she is not bitting and she lets  me get to her little ones and hold them- she was doing really well with them but she does not seem to be feeding them or laying on them very much-- I am worried!! as of right now none of them have a white tummy- and every time I go to check on them and her she jumps right out of the aquarium and does not want to go back in- I have been giving her breaks away but this does not seem to helping-- what do I  do? she is also always squeeking and almost chirping(not brunksing) just weird sort of noises- I hope I am just being paranoid? They are just going to be beautiful little sweeties- also what does it mean if the babies are like a blueish gray? some are pink but most are the blueish gray color-( the babies are only 3 days old and have been this color since birth so I do not think it is fur color showing- could it be the type?
Thanks for all your help-
It means a lot to me-
Jenni, Andy, Vanilla, Myles, Macy and the little ones-