Spotting! Either Implantation or a Period!

TMI Alert: So i'm using the restroom and I look to see what the cervical mucus look like and this time it was brown. It looks like old blood. And so I wiped again and it was a piece of blood, like a small clot. But not a big piece is a tiny small piece. So the question is…could this be the beginning of my period Or could this be Implantation bleeding?