Tabula Rasa

Harry has just found out that she's supposed to sacrifice herself to destroy the horcrux inside her. She's still in Dumbledore's office when she finds a strange artifact. When she touched it, she's transported more than 20 years in the past and in some kind of alternate reality where Tom Riddle is the DADA teacher at Hogwarts. Oh, and she has lost all her memories. FemHP/TMR.