FEEDING INTERVALS

Hello! I have a 4-day old baby and her feeding interval is every 2 hrs. She consumes random ounces each feeding time but most of the time, it's 1 oz or 2. Is this normal? I'm # little scared I'm overfeeding her. She is currently mix-fed since she can't latch onto me and my breastmilk supply is pretty low. Please help. :(