of course it is normal that you would be scared!  it is a huge responsibility to have a child, and you want to do it well.  you can be scared about thigns going well in the pregnancy, about the pain, about a baby growing inside of you, really about anything.  i think that it really helps to speak with friends of yours, to have friends that have been pregnant, and to be close with your mother, who knows best.  talk to people, read books, talk to your husband/boyfriend, and let your fear become excitement.  good luck to you!