I have a 4 week old baby that is strictly formula fed, but is constantly spitting up. We have her on similac for spit up, and she is spitting up after every feeding. Usually she spits up 30 minutes after and again 2-3 hours after the feeding has finished. We are using Dr Browns bottles, burping several times each bottle, and keeping her upright for feedings and at least 30 minutes after. She doesn’t seem to be in any pain at all when she spits up, but it’s happening so often! Has this happened to anyone else? If so, what can we do!?