Don't break my heart (Fairytail NaxLu fan fic)

Lucy finds out that true about her self, that she is the princess of the dragon and that is chosen to become the next queen. But what happens when her favorite guild is destroyed by dragons and her beloved friends are about to get killed. Will she accept her fate and train her self to become stronger so she can protect them or will she back down. The man that killed her mother is the man that wants to kill her now, because If a queen gives a birth. It means that that baby has the power to destroy the world and restore it. Which way will Lucy choose? To turn back or to follow her fate?