So I have freed Serana, and during dialogue with her, the quest "Awakening" finishes. Serana agrees to come with me but doesn't follow me. She buggers off in the opposite direction, when I catch her up and say "come with me" she agrees and says "lets go" or whatever - but she still wanders off - so I have to leave Dimhollow crypt on my own. I expect she might turn up as I exit the cave, or when I fast travel somewhere, but she doesn't. The bloodline quest hasn't even been triggered. So I don't know where she is, and using the console to move to her - doesn't work. Even using the console to start the bloodline quest doesn't work. I have no idea how to progress here - any advice?