SCH - sub chronic hematoma

I began bleeding pretty heavy and went to the Dr. I was diagnosed with a sub chronic hematoma above my uterus.  A week ago it was 2 cm and this last visit it has more than doubled in size to 5 cm. It looks like I have two sacs on my sono. (As if I am having twins but one is a hematoma) anyone out there with this same issue or have had this issue? It makes me nervous.