I'm so scared...

so 4 days left until my due date... and I'm absolutely TERRIFIED to give birth. I'm such a planner and the fact that I have no idea when my son is coming or no idea what could happen is scaring the crap out of me. And I know it's going to hurt like a b*tch! I tried talking to my husband about this but he just doesn't understand. And yes, I know as soon as I see my son I'll forget it all but that right now is not making me feel better or putting my mind at ease. Any advice?!