Possible teething?

My almost 3 month old has been drooling a lot lately and has been really fussy. She's normally a happy baby who only cries when hungry or needs a diaper change other then that she's good. The last 2 weeks though she's been super fussy, not sleeping much and when she does she wakes up a couple minutes later fussy. Plus she doesn't normally need her pacifier to go to sleep or stay asleep and now she does and she sucks on it really hard. I'm a first time mom and not 100% what to look for.