Hello,
Have you seen a chiropractor? I have several herniated discs and facet syndrome as well. When I was living in the states, I saw a good one and he did disc decompression on me and cold laser treatments as well, they sure did help. I also saw a Naturopath, she did acupuncture treatments which helped as well. I sure wish I was back there now, I have not felt good since moving here, 3 years ago, I will be glad to get back. I would sure give it a try, you could be pleasantly surprised.
It sounds really painful I have a L5 prolapse where the disk is off to the left so I know the feeling you have it sounds like you need to see a different specialist and maybe they now have a new treatment for you but id get on a plane to the United Kingdom and see a specialist there as the NHS in uk would be able to send you to a specialist who is in pain management and maybe even could get surgery on it