I second Nancy's comment. Adjusting what you are putting in your body will definitely help if you aren't already and adding some supplements like all of the B's you can. I take B Complex in the morning and afternoon to help boost my energy levels throughout the day.

I also struggle with fatigue. I am always tired but some days it is relentless, to the point I can't get out of bed. If you don't mind sharing, what medicine did your doc prescribe, have you used it and what have your outcomes been?

LDN is known to be a great drug with no side effects or long term effects. There's alot of research out there that states it's success on Fatigue.
This is one of them
https://www.practicalpainmanagement.com/pain/ot...

Otherwise have you tried eliminating processed foods, sugars, oils, fried food and artificial sweetners. These food items cause an increase in fatigue in our body.