I just got 4 impacted wisdom teeth removed 6 days ago, swelling has gone down but im still bitting little edge of my gums due to the little swelling still and im not having any pain where the incisions were made.

But i do have something bothering me with my very back molar in the top left side of my mouth. Even pushing against it with my tongue it hurts, what could this be? is it normal becaise the the extraction right behind it? a cavity? I dont remember feeling this when i had my wisdom teeth still in.