My 5 days old baby boy

Keep throwing up after being breastfeed 🤱🏽

It started last night. I’m not sure if I’m over feeding him. He’s getting enough from breast milk ( I have check and pump at least 3-4 ounces) but still wants more probably every hour. He seems to be a very hungry little guy all the time.

Even after he throws up he’s looking for more breast so I put a pacifier because I’m scared he will drink too much milk and throw up again

Is this normal?