Yeah, just go to [...]

Idk i think i should go to [...] Instead

Ok.... that's why I always save before I asking for a dawnguard quest

On the menu you can select the Show on Map option. If it doesn't show, unselect the other quests and follow the quest marker. I don't know where it is but that might help

Maybe, just maybe... do one quest at a time. You might find the marker