Hello. My girlfriend has been experiencing 6 days of discharge now. She said it started out light brown and got darker as the days went on. It is now a darker brown. Her period is still 7 days away, meaning the discharge started with 13 days left till her period. She is on birth control but happened to miss a pill one day. We did have unprotected sex. Do any other woman have this problem? We did do a 2 pregnancy tests, one at home and another at a medical clinic.