Vicky,
I was diagnosed with FBS after my first fusion. This actually is not a diagnoses like say "TB or virus, et.". FBS - is a condition and it can include different variates of symptoms. For you it back pain and damaged nerve pain, for me it can be shoulder pain and knee pain, spasms... and so on.
I read that FBS is just saying:" we did everything surgically we could and we don't know how to help you anymore since nothing is working". This the responRAB I got from my PM and my both surgeons. My PM keeps me alive

with pain meRAB and nerve pain meRAB - but you are right: all still there.
What bothered me the most in your post is the fact that you leave alone and that you have to do shopping without any help.
I read this, and don't mine me please, I cry. Because I know what it means to leave with CP and I can't imagine how hard this for you to be alone in all this. If you wouldn't be so far away from me, my husband and I would help you with all our pleasure. We have a lonely older lady here, all her kiRAB are so far away, we saw her one day in all this snow cleaning her drive way.
So sad but our lives is so preoccupate that we don't know sometimes who are our neigrabroadors are (we are relatively new in this comminity) nowadays.
We went to her and my hubby helped her to clean. She is such strong stubborn lady wouldn't let us do it; she has so much pride. But when I asked her if she has any family, she started to cry. Since than every single week we go shopping for her no matter what. And when she feels like it - she goes with us. She is not that stabborn anymore, lets us do it and it makes us so happy!
That is why you touched me so much with your story. I don't believe that you don't have nice neigrabroadors around you who don't see how you walk or that you leave alone... Maybe somebody is out there would be so happy to help you, sweetie? Don't feel that I feel sorry for you or something (I know some people don't like this, I don't mean to hurt your feelings by any means) just trying to help you the best I can.
I found that nerve pain is the worse pain ever. It can go from 5 to 10 in a minutes. It hurts me when I sit too, when I lay down starts this horrible stubbing pain in my foot and toes...
I know one meraber of this board had stim implant and he is very happy since he doesn't get nerve pain anymore. His back hurts as usually, but not nerve pain.
I agree with others: don't give up. It has something out there to help you. Even though I don't have much options anymore myself, but to have a GOOD PM Doc is a great thing since he keeps your pain in some comfort levels and works with you until you get to that level.
Best of luck to you!