My baby is head down...but Im paranoid !!!

Im 36w6d and was told my baby is head down....but Im so scared it can change and become butt down, she moves so much!!!... I tried to figure out if it has lot of chances to change or not at this stage of pregnancy, but didnt find the answer. I dont want a cesarian and I dont know why,Im clearly paranoid about her being not in a good position for birth :(

what do you think ladies??