You ought to find a way to stop the pain first, or else you're dooming yourself to relapse. If you want to try kicking, get your MD to Rx a good sedative like Valium or phenobarbital or Klonopin. You'll want enough to keep yourself asleep most of the time for at least four or five days. On top of that you need a blood pressure medicine like Clonodine for the heebie-jeebies. Get some Imodium and ibuprofen from a drugstore and start taking them before you start to withdraw. I never had any reefer when I was kicking so I don't know if it helps or hurts. Remember you're going to sweat like a racehorse and no one, I guarantee, wants to change their sheets in the middle of opiate withdrawal, so plan accordingly. But really, if you're in that kind of pain and opiates are the only relief, you've no reason not to take them. But if you start chasing the dragon, you'll never catch it.