My son will be a month old on the 29th. (since its leap year). Anyway ive had to switch his formula 3 times now. first he was on Similac advanced, and he was really gassy and uncomfortable then Gerber Gentle,still the same, now I have him on the Gerber Soothe and his Gassiness isn't as bad but I cant tell when he is that he's uncomfortable. His Ped told me to give him gas drops every 4hrs and that doesn't help. He doesn't spit up. Maybe he could be Lactose? I feel so horrible for him when he's gassy. anyone else have this issue?