Breastfeeding mommas

My little girl is 2 days old. I’m trying to wake her to nurse her at night but all she wants to do is sleep. I’ve been waking up every 2 hours and I change her diaper to wake her up and then try to feed her and she doesn’t seem to care at all. I do the same thing during the day and she’ll nurse. Just worried with trying to establish my supply, anyone else deal with this? I didn’t with my first.