3 almost 4 week old feedings

Layla

FTM here… my newborn usually feeds every 2-3 hours about 3 oz. Tonight he drank 3 oz at 12:50 am and woke up crying at 2:30a hungry. He had another 2 oz. Should I increase the oz amount to 3.5 oz or maybe he is going through a growth spurt? I just don’t know when I’m supposed to be giving him more. He’s satisfied at the end but is now waking up more frequently to feed.