There were many unlady like explicitives that found their way out of my mouth. That injection site is still painful. I was told that if there was not substantial relief for an extended time after two, it just isn't going to work. Of course the purpose for the injections is to take the inflamation out of the nerve and reduce the swelling. You also did not say if you experienced any relief.
Epidurals can work.
I know of people who have had great success. They are not for everyone, and I feel, should not be done for just any reason. You are after all having someone inject a chemical and a needle into your spinal area next to your spinal cord. You can experience nerve damage and scarring at the injection site. To help eliminate scarring, periodically rub the injection site area to break down any forming scar tissue.