I don't think being scared of an epidural is enough. You need to be mentally aware and prepared. The thing that helped me the most was knowing that is was the best thing for me and my baby. Sure you can have a painfree labour, but at what cost? I made sure i knew all the risks of the pain relief options, so if i requested them i knew what could possibly happen. I have had two births, the first i was induced due to PE and had to have an epidural. I really didn't want one but i was at risk of having a stroke as my BP was very high so i agreed. My second was a drug free birth. I would, in a heartbeat, choose the drug free one. For many reasons it was a much more enjoyable and satisfying labour. I hope my next labour will be another drug free one.

My way of dealing with the negative comments was not to tell anyone of my intentions! ;-)

And what Polly says is spot on.....
Believe in yourself and your body! This is what it was made for! YOU CAN DO IT!
And also remember, that necessary C-sections save lives. I thinks its important to not demonise intervention completely, because you could end up feeling awful after birth. Again focus on the fact that you have made another human. That is awesome. You will be holding your baby in your arms... YOU CAN DO IT!
I forgot to add, i labored for a long time in hospital with my second birth and i was not pressured at all. I just made it clear i wanted a drug free birth and not to offer my anything at any stage. When i asked for gas at transition mid-contraction the midwife said to me "are you sure?" And i said- post contraction "no, no i don't want it" This conversation continued for a few contractions, but having her question me helped me, as soon as the cx finished i didn't want it anymore!