Omg I'm having the same problem! Only scares me bc I don't want him to choke on it in the middle of the night after his feedings

How do you burp him? Like on your lap with him sitting up and you holding him or over your shoulder? If you burp him while he is in the sittings position it can make him spit up more cause his stomach is all crunched up.

He's just getting more than he needs. He's fine.

my newborn was like that, and a doctor said it's normal

It's pretty normal for babies to spit up.