HELP PLS!! my 2 months old has suddenly lost her appetite.?

For one, Colic is just a way of the Dr. saying "I don't know what's wrong so the baby'll just have to cry it out". Excess gas is just that, gas. At 2 months old, she's getting ready for a baby growth spurt. During spurts, baby's lose their appetites. I know all 3 of mine did. It's not too early to mix just a pinch of single grain rice cereal into her milk. It will set on her stomach longer and keep her happy longer.