Implanting?

Heather • Hi, my name is Heather. I have had two angels, and 1 beautiful little boy. We are trying to have 1 more child before I have a hysterectomy
I have a quick question. So yesterday was my ovulation day. And my fiance and I have been having sex the last three days trying to get pregnant. I used Preseed the last two times. My question is, is this inplantion this early???? I just went to the bathroom and I saw a tiny bit of blood in my underwear and when I wiped. Pink like? Can it in-plant that early?