Scared to give birth

I'm so scared to give birth all of the sudden. I had not worried about it before, but now I'm losing sleep over it. I still don't know if I'm having a vaginal delivery or a c-section, it all depends on whether my baby remains breeched. For those moms who've been through it, can I get some advice? Just need something to ease my worries. Oh–- and I'm 35 weeks.