Some of the most 'depressing feelings' I have ever experienced were during the 6 months I spent on subs. I recommend not using the drug unless your opiate addiction is to the point of complete hopelessness. The really bad news is the most depressing times you are having now, well, you might have to deal with that every day for a month when you come off the stuff.
Also, you might be 'dropping off the adderall' I was on the drug and it happened to me a few times a day for like 30 mins or so. It's the stimulant comedown afaik..
and..
If you're gonna stay on benzos I would switch to diazepam..