Thanks for the query.
As your bleeding time
is more than normal, it not good to wait for natural miscarriage
Because that can lead to further coagulation problems.
Better to induce abortion
During the process of abortion also blood parameters to be estimated regularly and precautions should be taken.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429