Implantation bleeding?

So I ovulated around the 9th of November. And I'm supposed to get my period November 24th. Now I usually get it a couple days early or a couple days late. But yesterday (the 16th) I had some light pink spotting which is a little heavier today. I'm thinking 8 days early is way to early for me... Think it could be implantation bleeding?

Anyone have similar stories?