So I am playing the Dragonborn DLC. I am on the defeat Myraak quest. I fought him as well as the dragons in the sky but he has totally vanished. I have wondered around but can't get to my marker. I have jumped but ended right back. Shot magic out at the thing in the sky. Flew the dragon but it just keeps circling. Im stuck and can't fast travel. I just cant finish the quest. Can anyone help me please.