Baby won't eat

Andrea
My daughter is 6 weeks today and is EBF. She's been eating non stop it seems the past few days. Well she woke up at 3am and ate like 3 or 4 oz and had another 1/2 oz at 6am. It's 8:40 now and she doesn't want to eat at all. She's not fussy or anything, just keeps falling asleep. Shouldn't she be hungry by now? I'm getting concerned