She's only 3!!!! she kept knocking this tooth and it keep bleeding. Today she just tripped (she has CP, so falls a lot) and I picked her up saw she was bleeding agin so asked DH to get a cloth when she spat out this tooth!! Took her to the densist who said that one of the knocks before possibly killed the tooth and each knock made it wobblier and todays knock just knocked it out. Either that, or it was infected. They couldn't put it back in as it would cause problems with her adult teeth so she is going to have no tooth there for a good few years