#AskTheExpert My daughter 4 months old is not responding actively from last 2 days and she is feeling irritated and crying even after changing diaper and feed. She is not smiling as before.

A. This probably means that your baby is growing. ... Parents often can't figure out why their sweet baby is suddenly a sleep deprived, fussy, cranky, overtired baby overnight. They begin to question if it could be an ear infection, teething, lack of supply — for breastfeeding moms — or maybe he's got reflux…the list goes on.