This type of bleeding is called threatened abortion
As you are having sub-chorionic bleeding , strict bed rest is advisable.
It means there is threat of miscarriage
but with rest and proper medication the bleeding subsides and pregnancy continues normally.
You are taking susten which is micronized progesterone
and given in this type of bleeding.
You can take them orally along with HCG inj.
Susten gel , oral tablets or injection's choice varies from doctor to doctor and they are not harmful.
Take folic acid
Get investigations done like Rh group , Blood sugar F , VDRL , Thyroid function tests
, Torch test , HCG levels in blood and regular follow ups with your obstetrician.