It Gotta be a growth spurt

We've had a really troublesome week. I'm glad I was with my parents so they could help. I've been having to pump most of the week for him b/c he won't eat from me. Anyway, tonight he ate at 4:30 4 1/2oz. Then at 7:30 3oz and then at 9:30 another 4oz. I have to supplement with formula b/c I don't have a back supply of milk. Can you believe how much this kid is eating?! Unbelievable. We'll see how the next couple of days go and how often he eats. He's up to 12lb 1oz as of Wed.