Struggling with Chronic Fatigue and Stimulant Abuse

I have been struggling with severe chronic fatigue since I have been about 11. I am 24 now and ever since I started working while I was in college and was no longer able to sleep for half the day, I have relied on stimulants. Ever increasing amounts of caffeine got me through my first year, once I resolved to have a social life I relied on cocaine to push me past essential functions, and eventually used it to get through work… once I was formally diagnosed with ADHD about 2.5 yrs ago I quit cocaine cold turkey and started my Dextroamphetamine prescription, but my relationship with it is not healthy. I always take more than I am prescribed which has not been good for my sleep and eating habits but when I am sober I am so, so tired. It’s difficult to want to change it when I know that on the other side of the amphetamine withdrawals my baseline energy level will still be unbearable. Does anyone else struggle with stimulant abuse that stems from chronic fatigue?