Been weighing on my mind

So I have this feeling of fear of dying while child birth. I don't know why I am so scared of something not common(well I don't know if it is or not). I don't want to ever miss out on my child's life and see my boyfriend become an amazing father. I am so scared of not making it. My doctor is fantastic and I know the hospital has a great birthing center, but nature takes its course..... Please tell me something that will calm my mind, nerves and heart and in a nice kind way. It's been on my mind for awhile now. Please and thank you.