I'm trying to do the Boethiah's Calling quest and I need a follower for it of course to sacrifice. But whenever I ask someone to be my follower they say I already have one. This is a problem because I don't have a follower. I had a dark brotherhood follower a month or two ago but I lost her and haven't been able to find her since. I've fast traveled and slept and tried multiple things to find her but to no avail. Now I can't get a new follower for the quest or get rid of my old one.