I traveled to Harbinger's Watch the first time, and backtracked after realizing the Dracolich was too hard for me. I then went around, completing quests and gaining levels and equipment for a day and a half of real time. I returned to Harbinger's watch, and I lost that day and a half of progress. The (Pre-DLC) save from my first attempt is present, and it didn't overwrite with my new save. Additionally, all the other saves I accumulated in that day and a half were totally lost. What can I do to reclaim the lost saves, and prevent this from happening when I try the dracolich again?