A.H.
I have a 9 month old who has recently gotten 6 teeth! he got one at like 7 months and had that one for a month or so and then all of sudden started getting 3 teeth all at once. It can be very hard and they get really cranky. But i mean some babies are born with teeth its just different with every baby i guess. But getting them fast is good then it will be over with fast! i've noticed that now that he got so many teeth at once it doesn't seem to bother him at much and he's calmed down alot so hopefully yours will do the same. if not i use the cold rags and frozen straws he likes to bite on them.
good luck!