New here! Subchorionic hematoma

Jacesmommy2due062014

Hi ladies! I was told I have a very large subchorionic hematoma at 9 weeks after a big bleed (I wasn't told measurements). I am now 15 weeks and it hasn't changed at all. I still get the odd bit of bleeding, mostly brown blood now. Does anyone else have experience with this? My ob said I am at a risk for miscarriage, which scares me. Also because of this should I be seeing a high risk ob?