The right back tooth right before the last one hurts when I chew . It's not a major pain and it started this morning . I woke up to take my sis to school and didn't feel any pain . I came back home and went back to sleep . But when I woke up again it was sore . I do remember eating some popcorn before i went back to sleep and one of those annoying skin things from the kernel got stuck in between that tooth and gum . I picked it out . So it could be there is still a piece of it stuck down there ?