It is hard for me to imagine why in the world you were tested for CMV as part of a "full STD work up". To my knowledge, we have never once done a test for CMV in my STD clinic.
Most adults have been infected with CMV, usually acquired in childhood from other children, although some cases indeed are sexually transmitted. Your result indicates a distant past infection that could have occurred any time in your life. It was not acquired during the events you described in your previous thread. Most initial CMV infections cause no symptoms, and certainly none of the symptoms you described was due to CMV. CMV can cause birth defects, but even most congenital infections are asymptomatic; severe congenital infection is rare. Finally, you probably are not infectious whether by sex or any other mechanism, with the possible exception if your blood were transfused into somebody. It means absolutely nothing for your sex life.
You are badly overthinking all this. You have no STD. I will have no further comment.
HHH, MD