He spits up abt 30 min after every feeding and I’m concerned that it’s vomit instead of spit up. He still drinks out of the bottles they give him at the hospital. He weighs 6 pounds 10 ounces and they are saying he is weighing small for his age so I try to feed him every 4 hours. Only problem is he is still hungry after that little bottle and wants milk every 2-3 hours. I don’t wanna overfeed him Bc I know that is the reason why he is spitting up. (I also burp him Every 20 ml in between and sit him up at least an hour after feedings) Any advice moms im beginning to worry I really don’t like to see that happening to my baby. Also I’m using Enfamil premium for newborns