can untreated ADD be a cause of clinical depression?

i had severe depression for 6 years during which time I made quite alot of attempts to kill myself, anti-depressants never worked

i also have chronic fatigue meaning lack of energy to do much of anything

i was put on Adderall for the fatigue and concentration/focus problems which got so bad, it was affecting my driving, plus I had a wreck over it

eventually the Adderall got to the point that it didn’t help the fatigue. but I have been 1 1/2 years free from depression, i couldn’t go one month feeling okay before I started taking Adderall

i actually felt like it wasn’t helping all that much with the other issues and quit taking it about a month ago

i’m not sitting around depressed 24-7 but i don’t feel right. i have thoughts I can’t keep control of that i sit around and cry over repeadedly (and no it’s not OCD). sometimes I get sad. it’s not constant but occuring often enough to concern me

i don’t NOR will ever let myself slip back into that state of mind regardless of what it would take to stop it!

Does Adderall treat depression or just ADD/ADHD? I don’t exactly understand why I feel worse without it. It isn’t like my fatigue, concentration/focus issues are any worse. So why would my mood get worse?