How to stop newborn overeating?

Hayley • ~IT'S A GIRL!! 💕baby # 2 due May/June 2019~ 💙William Jack 17-08-17 💙

I have a 3 week old boy who doesn't seem to know when he's full. He'll have a full 5oz and then want more as I'm pumping for the next bottle 😥 so I give him some of that too and he'll keep sucking and acting like he's thirsty right up until the point he throws it all up! It's so frustrating because sometimes he manages to keep it down and other times he loses so much he's hungry again an hour later 😩 any advice? It's driving me crazy to keep losing all this milk