DS is 4 weeks old. He nursed like a pro from right after birth and we have had no problems so far. However, for the past week or so he has been spitting-up/vomiting a lot. To feed him I offer the first breast, when he finishes or falls asleep I change his diaper to wake him up and then offer the second breast, which he always takes even if just for a couple of minutes to help fall back to sleep. The problem is that while changing his nappy he vomits what seems like a lot of milk almost as soon as I lie him on the changing table. Ideally I would change his diaper before starting to feed him, while his stomach is empty. But this would mean that he would only nurse from one breast as 9.9 times out of 10 he is in a milk coma after the first breast and impossible to wake. Is it ok to just offer one breast per feeding (and then maybe hold him upright for 10-15 minutes)? Would it lead to him needing to nurse more often?
His weight gain has been good so far (birth=3kg, 2 weeks=3.5kg, next weight check on friday). He does poo about 8 times per day and has plenty of wet diapers so I am confident that even with all the vomiting he is getting enough to eat.