Welcome to SR Aems!
Like you I am coming off an opiate addiction, my doc (drug of choice) is oxy and my habit was huge. I started it for legitimate pain but like so many of us I liked the way it made me feel, energy, euphoria, etc. And also like you I have serious abuse issues in my past. It's terrific that you've been able to do solid work on healing from it and separating from toxic relationships.
You've come to a good place for support while tapering and quitting. Check out the Substance Abuse section, too.
Take care.