Overeating baby?

My newborn is almost 5 weeks and already has been gaining about 200g every week (he’s breastfed) , however yesterday out of nowhere he starts eating over double his usual daily intake. He ate 22 times (and quite long feeds) and about 4 hours worth of actual feeding time. I kept trying to find other ways of settling him, but he kept insisting he was hungry and wasn’t spitting up or anything. Should I be concerned about this increase in feeding? I know he’s probably going through a growth spurt, but eating like every half hour for 20 minutes seems excessive to me!