Implantation or early AF?

Had the tiniest bit of blood in CM this morning. I’m currently 8/9dpo and AF isn’t due for 5 days. I usually spot for a day or two before AF arrives but this seems kinda early and it was a very small amount. I know implantation bleeding is relatively uncommon but it’s also not impossible. Praying for a positive test in a day or two 🤞 do we think this could be implantation or just AF coming a little early? I know there’s no way to tell for sure until I either get a positive or AF comes, I’m just feeling hopeful.