implantation bleeding?

Jeni • Tue, Apr 11 • Expecting our little bean 12|2018

Hi guys! Need some advise here. My period was due today but I only bled through a quarter of a tampon all day, it's peachy pink colored but heavy( as in not watery consistency) but then kinda stopped. I had unprotected sex every day including my fertile window. And I'm about 13 dpo. Any ideas? Was this implantation?