Catching it early simply means that your chances are optimal. They might be able to stop it before you have (too much) function loss, or before it starts to spread. There are patients who get worse despite early diagnosis and early treatment because the treatment doesn't work well, but at least you had a better chance to begin with (and to those that were diagnosed late, that means an awful lot).

I would discuss other kinds of treatment with your doctor. The nerve blocks don't seem to do you much good, on the contrary!