Almost 2 weeks old eats so much

My baby girl will be 2 weeks old Tuesday and she pounds the milk down. At night she cluster feeds and takes at least 4-5 oz. I have milk pumped from the day and when she’s done breast feeding she will take some of that too. During the day it really depends, she will feed on one breast and then pass out for 3-4 hours. Is his normal for a newborn still this young? She was 8lb 12oz when she was born and I feel she will be well above that with how she has been eating this week. She does poop a lot too lol