Our son is 2 months old as of the 11th. He is a breastfed baby boy. It seems like after almost after every feed he spits up. I burp him and keep him upright for 15 minutes after he eats before putting him to bed or down to play. It doesn't seem to bother him when he spits up. I just have to change shirts more often and change his clothes as well. He has plenty of wet diapers and poops at least once a day. I know babies pyloric sphincter aren't fully developed yet, but I don't remember my daughter spitting up this much. Any advice to reduce frequency of spitting up would be appreciated.