Implantation bleeding?

Megan
Quick question:
Yesterday I woke up and when I wiped after going to the bathroom there was pink/red blood. That was 10 dpo. Throughout the day it was mostly only when I wiped after going to the bathroom, and stopped after 8 hours. So far today there has been no bleeding noted. My period was slated to be due the 12th and has a very regular pattern of 4 days and starts very heavy. Do you think it is implantation bleeding or AF or something else? 
Thanks!!