Thank you for your query.
Subchorionic haemorrhage signifies that there is some bleeding behind the placenta.
In some cases, beyond the first trimester , such bleeding stops and the haemorrhage resolves.
Also, the myometrial contraction is an ominous sign
You should take absolute rest.
Avoid stress, anxiety and frequent travelling with jerks.
Abstain from sexual activity for the time being.
You can take duvadilan
as recommended, however duvadilan in research has shown no role in preventing miscarriages this early, however many doctors do prescribe it.
Duphaston is progesterone
which has a role in pregnancy