Is this a miscarriage?

Laura

I had a faint positive at 9dpo and yesterday went from Being a day late for my period to having some of the heaviest bleeding I've ever had. This morning I was getting ready for work and passed these two huge clots. If I clot during a period it's usually around the size of a nickel. I passed them about an hour apart and once I passed them the cramping and pain let up a bit. Do I need to see my ob?