PO5 - hopefully Milly's reflux will improve with the meds. Try not to worry about the weight. Amelia is also on the small side, around the 12th percentile, but I'm not worrying about it this time. DS was also below the charts for the first 4 months and him not gaining weight stressed me out big time. I let it get to me alot. I know DD is small but this time around I know that she is fine. That's just how my babies roll Milly will be fine too and who knows maybe once her reflux clears up, she'll have a growth spurt