Jillian, Thanks for your update and for bringing this post to the top. You have been through so much. YOur story is so powerful. I would absolutely INSIST that you not be given any sort of opiate painkillers. Do not fill the prescription if they give it to you. From what you described dealing with the pain of recovery from surgery will be a million times easier than what you went through on the painkillers. If I were in your shoes I'd rather grit my teeth and suffer through a few weeks of surgery pain than ever go back to where you were. 2 and a half years is major! You don't want to throw that away.
Best of luck to you, please keep us updated, I will be thinking of you. You are so courageous, you can do this.