My little one is 4 months old and I've noticed lately that when I pump the breast milk has changed color from a milky white to having sort of a yellowish tint. LO seems o.k. nursing, a little gassier than normal and poops are bright green and very smelly...could this be an infection? The only new thing I've been eating a lot of lately (new super yummy recipe) is chocolate chip pumpkin cake. Could the pumpkin change the color of the milk and cause stool color/smell change and more gas?