Subchorionic Hematoma

When I had my ultrasound last week my doctor said I had some implantation bleeding showing on the US. I went for an OB history appointment and mentioned I've had random bouts of brown discharge like spotting and the nurse was like well you do have a Subchorionic Hematoma so it's most likely from that . . . I have a what now?! Of course I googled it and it freaked me out. My dr seemed unconcerned by it and that's probably why she called it implantation bleeding.

Does anyone else have experience with this?