LO is 15 weeks and I swear he's teething. His hands won't leave his mouth. Drool everywhere. He pulls on his bottom gums with his fingers and claws at his face. He also has been insanely fussy and just wants to be held. Sound like teething? How many months can this go on for? If this is a 2-3 month process, how do you make your LO not be miserable for that long?