I have RSD. I had a nerve block done on Wednesday, May 23rd. It lasted 2 1/2 days at a pain level of 2. IT WAS GREAT. I LOVED GOOFING OFF AND LAUGHING WITH MY SON AGAIN.
In my readings, the first one lasts for a short time, and the second should last longer. EVERY CASE IS DIFFERENT.
My pain management doctor doesn't want to do another block. Since I had a positive result he believes that a Nerve Stimulator would last longer than a 2nd, 3rd, or 4th nerve block.
You will be fine. The only thing I would suggest is that you have your muscle relaxers refilled. My muscles in my back acted up afterwards.