Welcome
to SoberRecovery.com the forums danielseow.
I know from personal experience the withdraws from opiate addiction was a mess. All the symptoms you listed from your opioid withdraw were like mine. Although my use was not because of pain management so I don't know about that. I only know I had to quit using...not sure if that is something you can do without being in constant pain. But it sounds like your looking for a better way to live than the way its going for you now. Maybe sticking around here at SR can help.