Thank you ! It's A bit reassuring it can go away!

There's a post on this a few down...i can bump for you

What is a hematoma during pregnancy?

Chorionic hematoma (also chorionic hemorrhage) is the pooling of blood (hematoma) between the chorion, a membrane surrounding the embryo, and the uterine wall. With an incidence of 3.1% of all pregnancies, it is the most common sonographic abnormality and the most common cause of first trimester bleeding.

Subchorionic bleeding occurs when the placenta detaches from the original site of implantation. This is called a subchorionic hemorrhage or hematoma. ... These membranes lift apart and form another sac between the placenta and the uterus. The movement and resulting clots are what cause this type of bleeding.Sep 10, 2015

Hopes this helps hun