Postpartum - retained placenta?

I called my OB because I started bleeding and then I lost a big grey “clot” about 1/2 the size of my palm and I was told if I felt fine it’s no cause for concern and that they can check me out when I come in for my postpartum appointment at 6 weeks (next week). He said it’s most likely a piece of the placenta. I’m a very anxious personal in general so waiting a week is stressing me out. Has anyone else experienced this? I don’t have any signs of infection or anything 🤷🏻‍♀️