Thanks for the query.
The bleeding you are having could be a withdrawal effect of stopping the petogen
As you are having severe pain
and bleeding, better to consult gynecologist once and get examined.
With your doctor's advice you can take anti - fibrinolytic drugs to control the bleeding and anti - spasmodic drugs to control the pain.
If the bleeding do not control with this, you may need hormonal
pills for few days.
If your doctor recommends go for ultrasound
once, to diagnose any abnormality in internal reproductive organs.