I am sorry you are going threw what you are.
It sounds like a sleep disorder, I would go to sleep clinic and have a study done Along with seeing a neuro if that is possible for the 2 doc to work together. I do not have periodic limb movement disorder or hypersomnia. But maybe someone else here dose and can help you. I can send you my warm wishes for you to find answers and getting relief. It sounds really hard to deal with ..just sleepin for 3 days. Hugs to you Allie. I wish I could help with some answers .

Maybe tell your bosses what you have may help.
Peace Peace
BMW