Help! Baby sometimes chugs down on bottles and then throws milk back up. I'm on the smallest Mam teat, 0 for newborns as my DS is 4 weeks but was prem, so can't go smaller. I do the drip test before giving it to him, 1 drop a second. The teat doesn't look damaged but should I replace it anyway? Or is it him being over hungry so nothing to do with bottle?