Ya know, I have heard said more than once... If you have physical pain, pain that wears on you, wears you down... that pain is as much, if not more, of a threat to your sobriety than whatever pain meds you take, assuming you take them as directed.
So, don't be hero, or a martyr, take good care of yourself. Taking care of yourself, all of you, is what you need to do to maintain your spiritual fitness... right?
Also, remember that one day at a time thing... you'll know what to do when the time comes.
Mark