Bellatrix Lestrange's Daughter

Sarah Lestrange has had a hard life. Being the daughter of Bellatrix Lestrange is no easy task, and basically means you will never have friends. So Sarah runs away to Hogwarts under a different name. But Sarah's secret identity is discovered, and soon Sarah finds herself meddling with her own childhood and erasing her own birth. She has thirty one minutes to live... Will she be saved? Or will it turn out Sarah never existed?