for years now i've noticed that i've had a milky discharge (even before having intercourse for the first time), but it was only after having intercourse that i became paranoid and concerned about it. I went to the doctors and they tested for clymydia, which came back negative. It's not itchy and or smelly, what could it be? could it be a different type of STD? as far as i know my sexual partners have not had any STD's.