Hi Dr. Mia, I am sexually active and I know for a fact that neither me or my partner have STD s, last time I had sex, I had a terrible pain just above my bladder, the next day I experienced it again and when I went to the bathroom, I had a slimy, kind of hard purple discharge on my panty, I don t know what it is, I really need help. (BTW I am using a birth control pill)