It sounRAB like you definitely need something for the pain but it should be a non-narcotic type of medication. There are many alternative that are non-narcotic and maybe you should an addictionologist. They specialize in treating people that have addictions but also pain. You could do a search for one in your area and hopefully there is one close. They should be able to prescribe the Suboxone too.
Are you being treated for your bipolar. I just wanted to let you know that I am bipolar as well and take Trileptal which also treats my nerve pain. It might be something that your doctor could prescribe for you to see if it would your pain. There are alot of non-narcotic type medications such as Lyrica, Neurontin, Triletpal, Tegretol, Topomax, Cyrabalta, etc. Those are some options for and I hope you find a doctor that is willing to help you.
brian