Teething at 3 months old??

Mackenzie

FTM- My baby boy is 3 months old on April 24. He has been very slobbery the past few days and today he cried most of the day. Kind of a whiny cry- not his normal hungry/tired cry. He also has a loss of appetite and doesn’t take his passie. I know It’s possible for him to start teething this young, but is there any way to know for sure, or is this just typical baby behavior?