It sounds like you are in a world of hurt right now and are running out of options. I'm so sorry for your pain and discomfort, it sounds like it has a huge impact on your daily life. Aside from doing your exercises exactly as they've been prescribed and taking your meds exactly as their prescribed, I can't really think of much else to offer you aside from other various holistic approaches such as accupuncture or maybe even reiki, which if you're open to, might be worth exploring. Several of my patients, myself included have fabulous outcomes from holistic medicine.
Not to pry,and you certainly don't have to answer, but have you expressed to your doctor your reasons for not wanting surgery? Most of my patients are in discomfort following their joint replacement, but feel like new people once they heal up and they can go about their daily lives again. Something I always encourage my patients to do is to think about what they want out of the experience and write ANY thoughts and questions down to ask the doctor. It also sounds like you haven't had a good experience with your othropedist to date. It may be worth shopping around to find someone who is more willing to listen and work with you rather than give you ultimatums. Hope this helps, sorry I can't offer you more. I'll be sure to post if I have any brilliant ideas.
-TheQueenRN