Went for an ultrasound, the distance between the umbilical cord and th…

Went for an ultrasound, the distance between the umbilical cord and the fetal head is 8.3 mm at 35 weeks gestation, baby's weight was 2664.19 grams. I saw my doctor, she said if the distance is 1 cm, then she will schedule a Cesarean section. Who has had this before? How did they give birth? I am afraid of a Cesarean section.