Eating too much?

Angela

My 4 day old was nursing every 2-3 hours at first but since yesterday he’s been wanting to eat every 1 - 1/2 and sometimes twice in an hour, 10 mins a session. Earlier he ate for 20 mins after nursing an hour earlier for 10 mins. Is this normal? I know his belly is so tiny right now and don’t want his tummy to be upset and him be extra fussy due to it