Scared

Okay ladies, this is my first pregnancy and I am currently 19 years old. As I get closer to my due date, I am starting to become terrified of having to give birth. I'm so scared and I swear it's almost all I think about.😫 I have an EXTREMLY low pain tolerance...
How do the contractions feel? Does the epidural hurt? Is there medicine they can give you before the epidural to ease the pain? Please give me any advice.