Pelvic fluid or Duchenne’s fossa fluid has two sources, one is post-ovulatory follicular fluid, which usually appears during the peri-ovulatory period; the other is pelvic inflammatory fluid, which appears at a time unrelated to ovulation. Your discharge of brown discharge is not related to inflammation, but may be related to irregular bleeding of the endometrium, to be understood by a vaginal ultrasound. To find out if there is pelvic inflammatory disease, please see your gynecologist for a gynecological examination to clarify. Positive signs include excessive vaginal discharge, painful cervical lifting, and pressure pain in the uterus and both adnexa.