J.S.
I second the "dreamfeed" recommendation (feed her without waking her right before you go to bed). As well as the loading her up with feeding before bedtime ie "tanking up". Try to get as much in her as possible before bed.
That said, I think 8 weeks is simply to early to expect much as far as schedules/sleeping go. Another few weeks should make all the difference.
Hang in there and congrats!