Baby spits up a lot?

My son is 12days old and I feel like he spits up more than he should?

He has regular wet diapers and he eats every 2-3hours during the day, anywhere from 10-40minutes at a time and he seems to be glued to me at night (lol).

But after almost every feeding he spits it up and it seems like a lot, but then he wants to eat more. Is this normal? Or should I consult his pediatrician about this when we see her on Tuesday?

I know he's gaining well though, as he gained 7oz in three days from his appointment last Friday to this past Monday. I didn't think to mention it then though as he wasn't spitting

up as much as he seems to be doing now.