I think most people are afraid of giving birth to varying degrees.
I know for me the best thing was to really educate myself and learn that my body is MADE to do it. It also helped me to think about my options and what I would be most comfortable with (hospital, birthing center, home birth, drugs or no, etc.).
Talk to you doctor, read books, watch documentaries...it might not be as scary as some have made it out to be. =)