Oh dear! Only baby teeth grow back! Sorry. You need to go to the dentist asap! They will probably extract the tooth for you. BTW, for future reference, the worse thing for your teeth is having Sugar all day long! In other words, if you are going to eat a candy bar, don't eat one little morsel every hour or one little bite every while, eat the whole thing at once that way, you are only damaging your teeth once and not all day long!