Anyone have a subchorionic hematoma?

Christel • Single mom of a beautiful 2 yr old daughter who's excited about becoming a big sister this December!
I'm 9w2d and was just diagnosed with a small subchorionic hematoma in the er. I went in due to mild spotting and cramping. The dr told me this could mean the beginning of a miscarriage and has put me on bed rest until i see my dr Friday. Has anyone experienced this?