With the information you supplied, I would take this plant out of its pot, discard anything obviously dead, or slimey, remove all soil arond the roots and rinse the healthy roots carefully, purchase a bag of cactus soil at your local home improvement or Wally World store, and repot the plant. If the good leaves droop too much, stake them. Put it where it will get a pretty good amount of light in the day. These plants do NOT require much water. If you treat them like a cactus, they should recover. Good luck.

There really wasn't/isn't any slimy parts, but there was mold growing on top of the dirt, which I suppose indicates over watering? THe plant was re-potted two years ago and it was not an easy task. What is causing the drooping?

I don't know what is causing the drooping, but just because you traqnsplanted it 2 years ago doesn't mean it is getting the water it needs....Your root ball may be so tight that when watered, the water runs right through it. When peat dries, it is hard to rewet again. Does your pot have a hole in the bottom? If not, it might be waterlogged. These plants need fast draining soils.