Had sex with my partner on 7th and 8th of march and my period were due for 21st march, but it started on 19th march. I'm not sure if it was normal period or the implantation bleeding as the discharge was initially brown and later pinkish and it lasted only for one and half day. I want to know when is the best time to do the home pregnancy test for accurate result. I'm very anxious to know if I'm pregnant.