5 day old eating 4 oz before bed

So my 5 day old eats 2 oz every three hours in the day but when it comes to the evening he wants so much formula. I’ll usually give him is 2 oz and put him down for bed and give him is soother but he sucks so hard and spits it out than shoved his fist in his mouth and gives me all the feeding cues for more milk and eats another 2 oz. When I burp him he doesn’t spit any of it up but than after he has ate his 4 oz he has trouble sleeping and I really don’t want to give him more because 4 oz is alot for a 5 day old. I didn’t have this with my other 2 boys so this is different for me. Some nights he sleeps 5-6 hours but last night after the 4 oz he woke every 2 hours for another 2 oz. Any advice would be appreciated! My husband just says he is a growing boy but I don’t want to be over feeding him.