What's my risk for the cord coming out of the placenta?

Meagan • I am happily married to my husband.
I'm 6 weeks pregnant and I have heard two women last year died because of that reason. I don't know how true it was but it was on the news. Just wondering what's my risk of it? My mom keeps telling me they have other health problems! I will be having a c-section. Also what helps nausea besides crackers and ginger ale?