subchorionic hematomas

Aly • My son born 6/14/17 he is my rainbow 🌈 baby 👶🏽
Any know anything about this? 
At 6 weeks I found out I had this, from 6 weeks to 8 weeks I had brown spotting. 
Now I am 14 weeks and still have it but haven't had any spotting. Is anyone else in the same boat or has had one? Please help me!  
Can I loose the baby over it?