I agree with most of the other posters; I think the Fluttershy bit is a little bit out of character. She'd give me the benefit of the doubt.
But if it did happen, I'd burst into tears and run away, following the train tracks to Canterlot; to possibly try to find Princess Luna. She'd understand, right? And Celestia could set things straight.
EDIT: I suppose there's no way I'm going to outrun Rainbow Dash, AJ or Pinkie Pie. So instead I'd ask Twilight to contact Princess Celestia.