Had this yesterday afternoon, i've never experience implantation bleeding; but i've also never experience this period. I ovulated twice this cycle. One at my normal time, and another about 3 days before my expected period so I'm all messed up this cycle. This would be 14 days after BDing, Also would've been 11 days after ovulation peak on test. Haven't tested but also if my period is going to come, it would be due the 19th.