My sister(she doesn't have RSD) had a c section with my nephew 8 1/2 years ago. Cord was wrapped around his neck. She was given Vicodin for the pain for a short period.
If you think as it is closer a c section is going to be done and maybe if not since sometimes like with my sister they have to decide to do one as an emergency. Maybe you can start the vitamin C pre surgery protocol if it is safe for the baby.
Hopefully the specialist will be good and helpful