Okay so my daughter is 2 months old and she eats up to 5ozs of formula and I just upped her to 5ozs but she still cried after she eats the 5 I tried to up her to 6 but she don't eat the full six and then lower it to 4 and she's still hungry and crying. I'm a first time mom and I'm not sure what to do and her pedi says let her cry it out but I can't let her do that. How young can I start cereal or a cereal bottole?? Please any advice will be great