I am having brown discharge that started four days ago before my period which is scheduled to start tomorrow. On the first day I noticed brown discharge, it was on and off throughout the day and it was only when I wiped. The second day was bright red, went back to brown, and was only when I wiped but definitely heavier. The third day, I had to wear a tampon and it was dark brown. Today it is dark brown like yesterday and I am wearing a tampon. I am expected to get my period tomorrow because I am on Sprintec birth control pill. I have been taking it for 9 months and I have never missed a pill, and the latest I have been was by an hour and a half six months ago. I take it within five minutes every day and am very good about my pill. I have unprotected sex with my SO, but we are curious if this is implantation bleeding or just a very strange period. My placebo week started yesterday if that helps. Thank you!