Nope your not going insane *hug* the simple answer is her age, hormones are kicking in, and she is at that point that they feel everyone is against them and everyone else is put on this planet with the sole intention of getting at them, ask anyone who has lived with girls ( probably boys to, but i never had boys) of that age, they will all be able to relate very similar stories, and probably a lot worse,my standard reply to that behaviour was to calmly tell my daughter that there was only 2 of us in the room,and her behaviour was not impressing me like it did her friends, and then just turn and walk away, no point getting into a pointless argument that achieves nothing but you ending up upset.Stay strong, it does get better, i promise xx