Early pregnancy sore vag after sex that resulted in spotting for a hour. now i have brown discharge when i wipe. what is it? should i be worried?

Preg bleeding: Any bleeding during pregnancy needs to be evaluated promptly by your doctor. About 50% of women experience some degree of bleeding in early pregnancy making it very common but not normal. Most are fine but sometimes bleeding can indicate a tubal pregnancy or miscarriage. Get checked.

Old blood: It is old blood that has changed color from red to brown from either the sexual escapade or the intrauterine pregnancy itself. Your OB MD can make the distinction upon examination.