A little more info would be helpful. Has your DS always been on the small side or did he fall off the charts? Are either you or your husband a small person? Is he peeing and pooping enough on BM? There are PLENTY of babies on this forum that are at the very bottom of all of the growth charts and some that aren't on them at all. Some babies are simply small, so without all the info it's hard to say what's wrong..
Abra, Married to George, Mother to DS 12/03 & DD1 08/09 & DD2 12/11 + Someone New in May 2015! After years of planning, we are finally living our dream in South America!!