Welcome to SR ZM, admitting the problem is half the battle, that half of the battle was Mary Jane convincing you who is boss and you accepting/surrendering to that fact.
Now comes the tough part and this is where recovery programs come into play, you mention NA, go to as many meetings as you can, when there is not an NA meeting go to an AA meeting, find a temporary sponsor, take the steps as soon as possible.
Dedicate as much time and effort to your recovery as you did getting and using your DOC! You mentioned being laid off, this may be a blessing in disguise allowing you to spend maximum time on your recovery in early recovery.
No tears this time . No anger. I just want to be free. I cant continue to ignore NA. I cant continue run away from what God is trying to give me. I cant continue to not embrace God as my truth. I cant continue to wait for a "bottom" to force me to quit. I dont want to die because of this.
You know what you need to do, grab the bull by the horns and do it.