Second set of molars already !?!?!

ML • 👨‍👩‍👦 💙3/4/2019 👼01/12/2021🤰💙19/11/3022

Is any of you have their LO starting their second set of molars? My son started this week drooling and putting his fingers in his mouth, which he only does that when he’s teething. I looked on Internet and it says that in general, the second set of molars appear near 22 months and my son will be 17 months soon... it’s kind of early!