Implantation bleeding in pregnancy maybe....?

It very well can be. I just found out I was pregnant 3 days ago and just like you, me and my husbance had sex, then I ovulated the next day. Around 2 weeks after that, I wiped and saw pink colored discharge. It only lasted for like 2 wipes then after that, no blood. A week later I took the test and it came out positive. =D