Hi,
Welcome to the forum. I am really glad to help you out. On your next visit, you should ask your radiologist to look for the subchorionic hematoma. A subchorionic hematoma is just like a mini placental abruption. The 2 important factors which determine the outcome in such a scenario is the size of the clot and secondly the distance from the placenta.
The small the size and the more distant it is from placenta, the better are the chances of recovery. Nobody knows the exact cause of the hematoma. Something definitely needs to be taken care of is bed rest. Sexual intercourse should definitely be avoided as it puts a lot of strain and can result in the worsening of the hematoma.
Usually, if the clot/hematoma increases in size, miscarriage happens by 16 weeks and if nothing happens till then, there are high chances that the hematoma is absorbed. I sincerely hope that helps. Take care.