I have a brick wall and need help. Are there marriage records for Abbeville?

I'm looking for:

Unknown CAIN m Anne WILSON c 1790.
I assume this was the Abbeville area since that is where Anne was raised. Her father was Robert Wilson, a farmer in Abbeville, who died c 1810. He was married to Unknown (maybe Bathsheba or Bursheba).

Unknown Cain died c 1800, and Anne Wilson Cain married a 2nd time, to Unknown Sheppard/Shepherd. Possible names for him are James or Jacob.

Anne Sheppard died 1818 in Abbeville, SC. I have a copy of the will. She stated her father was Robert Wilson who rented farmland from a Mr. Remey. She does not mention her mother's name, but does list her 4 sons:
James Oscar Cain b c 1796
William Cain b c 1799
Wilson Shepherd b c 1803
Tinson Sheperd b c 1805

Thanks in advance.
Pam