oh bugger....i typed out a long response and then hit the wrong stink'n button sorry.
basically....you were/are probably self-medicating for a real reason...a reason that needs real medication to do any real help. Addictions run in family lines and mental illness runs RIGHT along side that.
you can do a little detective work of your own and see what might be going on. like you could google "signs and symptoms of mood disorder" and see if anything fits. i can't tell by your post if there are any major mood disturbances going on, but probably so with the substance absues issues...so now that you are off of the substances....look to your moods now and look to how often you "slip" and self-medicate. Those are MAJOR keys to your life puzzle and your happiness.
1. schedule a full diagnostic testing session with a psychologist
2. With the results in hand, go see a psychiatrist for medicine start and management
3. educate yourself about what's affecting your mental happiness
Welcome and hugs,
jenna