That's part of development actually to be drooling and hands in mouth, as they find them and learns to use them. My first boy had teeth coming our at 4months, so it is possible 😁
My babe been doing the same thing and she pissed and is usually a very chill baby!! And I put my finger in her mouth and she just started biting on it non stop!! And he sleep is much worse than before I’m not sure if it’s teething and if to give her Tylenol
They can start teething at any age... however they only actually experience pain/discomfort once the tooth has begun to cut through the gum. So if you can't see/feel any coming through, then it's not due to teething.
Mine done the same at 10 weeks. Download the Wonder Years app and it gives explanations for many of the developments they’ll experience! Turns out that’s when they discover their hands 🤷🏻♀️ and just love to eat them lol
When my baby was teething young the doctor put a glove on and checked for little lumps on the gums I imagine you’d be able to do the same x