Sherm,
Good luck with those. Mine didn't help and I had 3, but I know several people who did get relief. One friend got 1 injection 10 years ago and said he has been good ever since.
I just had fusion on L5 s1, and we are waiting to see how I do before doing l4/l5.
Have you tried a chiropractor? Also Robin Mckenzie has a book on excercise to help your back. I can send you the book if want to try it, it is only 70 pages and I got it used at amazon, but if you have numbness they say not to use the book.
Good Luck
Mark