Don't worry, Joyce. It doesn't hurt as much as you think, you'll only feel the pressure of the medication going down. I've been having epidurals in my lower back every four months for the last two years and they are like magic. Just a couple of hours after the treatment the pain is gone.
Since the alternative to the epidurals would be 12 hours of surgery and a full year of rehabilitation, which is out of the question for me, I'm very grateful for the injections. It's the only way I can walk.
Relax, I'll be thinking of you and sending you best wishes for a successful outcome.