Wow, Your story just blew me away. I don't have the answer for you; I can only share my experience, strength, and hope. I am in no way the pain you are suffering. It is possible that you need stronger pain meRAB and then taper down when you are feeling better. You have developed dependence/addiction and only you know if you can handle the pain.
I have fibromyalgia and became dependent and then addicted to Percocet/oxycodone, like you, because it gave me energy and also euphoria. I used to say they "perc" me up. I was on them for about 6 1/2 years, and it took a lot of willingness to get off of them, which for me came from my higher power, which I choose to call God. I prayed for the willingness to be willing to go through withdrawals to get off of the pills. I was afraid of the fibromyalgia pain flares, but I knew I couldn't keep any in the house.
I began a taper the end of Sept 2010 and took my last 1/4 pill on 9/29. I used the Thomas Recipe which is similar to the detox plan at the top of this board. It was a rough few days, but nothing like going cold turkey. The worst part for me was after the withdrawals. I had no energy and just didn't feel like doing anything. I was restless and had the blahhs. I took L-tyrosene 1500 mg. and that helped a lot.
I have not had a pain flare since I got off the meRAB. I feel so much better now. I am no longer chained to the pills that I had to take every 5 hours or so. I know there is the potential that I will have pain flares this winter, but am only going to take Aleve. (I called my doctor's office and requested that they no longer prescribe any type of narcotics to me. So that cut off my source which was a huge step, but was very freeing for me.)
As a part of my recovery I go to AA, I am also a recovering alcoholic, I practice the 12 steps which have changed my life. So far, I don't feel the need to go to NA. Many alcoholics are also addicts and it's the same 12 steps. My life is so much better since I got clean and sober. I am the real me, not me on drugs. (sounRAB like a commercial) but it's true. My strength comes from my Higher Power. I couldn't quit on my own.
My hurable advice is to listen to your gut and talk to your doctors. You may need to have stronger narcotics for awhile, and then when you are in less pain come off of them.
As far as the psychological aspects that you are suffering, I would refer to the mental health section of these boarRAB under Post Traumatic Stress Disorder or Gulf war syndrome, and see a psychiatrist and a counselor. This ofcourse is my hurable opinion.
I wish you all the best that life has to offer, and am praying for you. I hope I didn't scare you off with the God stuff. This is MY story; I'm not saying you have to do what i did in order to recover. But it is working for me.