Congrats from me too! How exciting! First, I just want to say that you can get the "shakes" even when you don't use any drugs. It's just the adrenaline. I had them both times, and I went natural. It's pretty crazy not being able to control chattering teeth. :)
And second, I would also encourage (but not strongly - it's a personal decision) you to think about going natural. I did it two times, and wouldn't trade it for the world. Both of my labors were fast, and the pushing was very fast, b/c I was up and walking right before both babies were born. Yes, of course, it is painful. But there are natural ways of relieving pain. The first for me, was just realizing that the pain would come in waves. Sure, it's horrible during the contractions, but they go away and your body feels great. You just got to ride the waves. Then there's your support person. Undeniably, absolutely necessary when you're going natural. You need someone to speak for you when you're unable. And to reassure you that it's almost over, and you're doing great. And last, I was fortunate enough to give birth in a birthing suite hospital. They had jacuzzi tubs in private bathrooms, so during the worst of the labor pains, I got in with the jets at my lower back (where the pain was the worst), and amazingly, was actually able to talk through contractions! I was tempted to have a water birth the first time, b/c I just didn't want to get out!
At any rate, whatever you decide, your experience will be worth it - you will have a brand, new family member at the end. If you go with the epidural, the best thing you can do is trust your doctor, and think positive thoughts. Practice that beforehand, as well.
PS. I also wanted to mention that surgery is very, very different than giving birth. There is simply a joy to it. A feeling that this is the way it's meant to be. So as far as the anxiety attack, just the occasion will probably be different enough that you will have an entirely different (and more positive) reaction.