Hi Davey- I don't post often, but your post really caught my attention.
I too have chronic pain issues. I quit drinking for good 22 years ago. Went to a doctor for migraines/back pain several years later and ended up on painkillers. Twenty years later I'm still struggling with staying off the opiates.
So my advise to you is find another way to manage your pain. Hot baths, physical therapy, ice,massage..just know you are taking a huge risk by going down the opiate path.
I wish I would have never gotten started.
I really hope you find some relief soon. I will be here for you if I can offer help.