Board Thread:Skyrim/@comment-124.176.55.142-20150213105900/@comment-6881629-20150213113835

Nope Werewolves can't do the Vampire questline, Serana can bite you but i'm pretty sure thats only after questline (you could try finding her in the castle just in case). I think your going to have to go back to a save before you became a Wolf if you have one or if your on PC use the console.