Sorry to hear about your difficulties - I hope this information will help.
You have probably heard about the research study which was recently carried out into yoga and back pain, and may have heard that it found yoga can help significantly with back pain. However, you do need to make sure to find a class or teacher who works specifically with back pain and spinal conditions. Some yoga classes are really not appropriate, and you should always talk to the teacher first to find out if the class is for you.
I've attached the research findings below, and also the website built by the team that put together the yoga course (http://www.yogaforbacks.co.uk/
). You don't say where you live, but this site may help you to locate a teacher that you can work with.
In London, I recommend Adelene Cheong, who has a scoliosis, and who has developed a course specifically for scoliosis. Her details are below. She teaches at the Life Centre and Triyoga.
I wish you every success in finding some relief, and if you need any further advice, please do feel free to contact me directly - my website is also listed below.