Yes, with that much pain med it is highly probable that they are causing more pain than you actually have (all the time.)

Detox is not fun, but I'm glad that he is offering the epidural at least. I doubt that it will allow you as much as you're used to, and that can be very difficult at best. If you experience too much withdrawal, call and tell them, and make sure they help you wean more slowly. Usually when you see a doctor like that you sign an agreement that you won't take anything except what that doctor gives you. Be sure that if you have signed that, that you don't even take an aspirin (for pain) without consulting him! They can drop patients like hot potatoes if you don't comply. I wouldn't want you to lose someone that sounds interested in helping you.