usually after delivery up to 2 to 3 weeks little bit of spotting can be seen and that will usually subside, if you had heavy bleeding then the possibility of retained bits can be suspected,
are oral combined hormonal
pills which will by modifying the hormonal levels can stop the bleeding,
but they can cause breakthrough bleeding
sometimes that may be responsible for your bleeding now, anyhow you better consult your doctor and undergo ultrasound
to rule out the possibility of retained bits then after ruling out them with her advice you can continue the pills as the side effects will subside soon usually.