having sex before, or during
ovulation, and or engaging in intercourse before, or just as your
menstrual cycle begins, male ejacualtion on or near the vaginal area are all risks. You've previously mentioned that you know, and understand your body in a sense that when changes occur you are aware of them. My advice would be to seek the professional guidance of a primary care physician, and or Obgyn, who would can better answer any questions about the concerns you're experiencing.