I Had unprotected sex, on one of my ovulation days (the 17th). A few days later i had a light pink streak when i wiped. Now i ts been 12 days and i started bleeding. I started the bleeding yesterday. It s no where near the amount of even a light period, as its very little. It started off as very dark, brown, and has faded to a murky red to a bright red. I was wandering if this could be considered to be implatation bleeding.? Also I am due to start my period around the 4th (Friday). When would be the best time to take a home pregnancy test and receive the most accurate results?