My VERY happy baby has allllll the signs of teething. She used to be happy & perfect, now is fussy almost all day. She drools like her mouth is a faucet & she chews everything in sight. She is 14 weeks tomorrow. This COULD be teething,right? My coworkers (who know her well..she goes to work with me till noon every day) say no way it's teething she has a belly ache. I'm so confused! Thoughts?