Be very careful about the bleeding if you are in the early stages of pregnancy. If it is moderate to heavy bleeding you need to get to the Dr., and be checked. But sometimes women will have some bleeding when their next period is due after testing positive. I would play it safe and contact your Dr. I give all my new mothers this advice because things could change very quickly.
Depends on how heavy you are bleeding. If it is light, you probably have nothing to worry about. If the bleeding is heavy with blood clots and you experience cramping, you need to see a Dr. ASAP.