I woke up this morning feeling oddly less pain. I'm kind of walking around the house going when is the crushing burning pain going to come slamming back in full force??? I usually9 wake up feeling horrible and have to play catch up with the pain. I looked up this block and I see that it could take a couple days to for the injection to work (I had it done Wed), have any others ran into this? How long does it last? It isn't completely gone, but a big edge is taken off. WOW, is all I can say...