1) I agree with Neurochic.

2) Speaking from personal experience, without going into "My Story," I would advise very heavily against doing anything invasive like a lumbar nerve block, IF you are already making steady improvement. No matter what a doctor will tell you, nerve blocks aren't curative; they're just a short term source of pain relief with their own set of potential complications which are NOT WORTH THE RISK if you're already getting better.