Brown Discharge?

Lauren • #AirForceFamily have a son named Julian with a baby girl on the way!💙💕

Hubby and I have TTC started my fertile window September 1st and been having sex every single day. My Ovulation day was September 6. I have been cramping and today, day after ovulation wake up to dark brown discharged on undies. Ended period Aug 30th and not suppose to start next period for another two weeks.This has never happened to me before... what could it be?