Jeepers!!!

You ARE lucky to be alive!! God was WITH you in that vehicle ~ I hope you know that!

And He's been walking with you ever since!
He obviously has something he wants you to do 'down here.' You've got to figure out what it is! Maybe he wants you to help other chronic pain patients ~ or other addicts. Whatever, you've got a purpose!!!
You'll get your life back the way it was ~ I have no doubt. You know your pitfalls ~ and you know the hell that is waiting for you if you're not diligent.
One thing you have to remember is you are NOT the first or only one who has "relapsed." Almost everyone has done it once or twice - sometimes more often ~ the important thing is you got back to where you SHOULD be, and hopefully this is where you'll stay!
Since God spent an awful lot of time on you ~ don't disappoint Him. LOL Hugs, Lee