It's fairly easy to get a legit script for modafinil. Think of it as a minor amphetamine. If you don't take it every day it should help you with the fatigue. Some people call it a nootropic like the drug Bradley Cooper used in the film "Limitless". It's not. But it does keep you awake and doesn't raise your blood pressure. Generic versions exist and don't cost that much.
I use it often, but back in the 1960s I wore very brightly colored tie dyed clothing, marched against the War in Vietnam, and ingested many funny things. Now I'm 70 and still not afraid to self-medicate.
And depending on how the Presidential election goes I might revisit some of my old haunts, singing Lucy in the Sky with Diamonds.