I can’t get my sleepy baby to wake up or stay awake to feed and I’ve tried everything. She has a…

I can’t get my sleepy baby to wake up or stay awake to feed and I’ve tried everything. She has a great latch it’s just getting her up and staying awake to feed that’s stressing me out 😞 I can’t just assume she’s not hungry because she really needs to eat and hasn’t much today. The nurses at the hospital didn’t even help me much or show me much about breastfeeding so now I’m home stressed out about this and feeling discouraged