Hi, L.!
I'm not anti-C-section, so I'll answer the question you actually asked instead of giving you unsolicited advice.
I actually have an anxiety disorder and my doctor was aware of that when we were discussing the possibility of a C-section. I can't relate to your specific issue of scar tissue around the needle site, but had plenty of fears of my own. I found comfort in information and I hope you do too, so here goes:
First, you will not get an "epidural" like most people think of for a planned C-section. You will get a spinal block instead. An epidural goes in next to your spinal column and stays there, pumping medicine into you as you go through delivery. A spinal is a ONE-TIME poke. They will sit you on the side of the table, have you lean forward and try to be as still as possible for about 45 seconds. They will clean and numb a small area on your back and you will hardly feel the actual poke, but will feel a burning sensation as the injection occurs. Before you even have time to think about it, you will be completely numb from your chest on down. You will feel your shoulders and arms, neck and face, but nothing else. Your husband won't be allowed into the room during this initial procedure, but will come in wearing scrubs once you've laid down.
They will help you lay down and will place a breathing monitor on one finger and have your arms spread out to the side. There will be a sheet blocking you from seeing the surgery and my husband chose to stay behind the sheet with me and hold my hand. I had been told that I would feel pressure when the surgery started, but I felt none. I was about to ask when they were going to start when one of the doctors said, "This baby has a lot of hair! Almost out!" I hadn't felt a thing and here they were almost done! I heard the cries of my son and everyone congratulated me and I sent my husband over to the baby. I know they had to stitch me up, but I was so busy asking about weight, length, hair color, and apgar scores to pay attention.
I was wheeled into the recovery room and watched my son get his footprints taken and snuggle with my husband for the first time while the nurses did what they needed to do for me. I was then wheeled down to my room where I got to snuggle, try to nurse, and witness his first bath. The numbness wore off after about an hour and I was thrilled to be able to move my feet again! I had pressure cuffs on both legs (and you will too) to stop the possibility of blood clots, but I was sitting up by lunchtime and standing by dinner.
I won't lie to you, the next day when the pain meds wear off and they take out the IV, you WILL hurt when you sit up or stand, but it's the movement that hurts. Once you're in the desired position, you can get comfortable and get to know your little one.
Please talk to your doctor about your fears - they can help you understand exactly what they will be doing for you personally and put you at ease. I see you're a new Christian, so congratulations on that decision - get yourself on a prayer chain, the most powerful tool of all!
Hope all this info helps - good luck!