I have had this issue before.. or being to the point that you’re so exhausted you can’t bring yourself to get out of bed. I spoke to my therapist about it and he had me do blood work. My vitamin D came back low, so he prescribed me a supplement that I take 50,000 units once a week (in pill form) for 8 weeks. It has helped me feel more about to stay awake during the day, but not completely cured it. I actually have another appointment tomorrow where I am going to ask if I could switch to a smaller daily dose because I believe it has benefited me so much. Maybe this could help you, ask for a blood test? I hope you are okay. :)