As she grows up she will become more active.
I would up her amount of both physical and mental exercise.
Redirect her with a toy when she goes to bite you.
As for the peeing, how large is her crate? She should only have enough room to turn around and lay down any more room than that and she will pee in there. Also, if she can't hold it that long you may need to take her out twice in the night instead of only one time. Maybe take her out at 1am and then out again at 5am.
Sinister ~ black GSD 3.11.09
Draven ~ Dalmatian 6.30.13