DS is 6 weeks old and is currently going through a growth spurt. I feed him breastmilk out of a bottle and supplement with formula. He has had terrible gas since day 1 and we have switched around the formula and noticed a significant improvement with the soy formula. Since we started him on it he's been like a new baby and all of a sudden with this growth spurt he is crazy gassy again and very irritable. I am wondering if the gas is could be a side effect or if I should start looking at new formula all together? Usually he does well with breastmilk but even that now irritates him.