Vaginal bleeding  is normal with the abortion pills, but it is advised to monitor your bleeding. If you soak through 2 regular pads per hour for 2 hours in a row (ie 4 soaked pads in 2 hours) after you think you passed the pregnancy, this is considered very heavy bleeding, and you should seek medical help.
 Gynuity. Providing medical abortion in low-resource settings An Introductory Guidebook. Second Edition. 2009. Retrieved from: https://gynuity.org/assets/resources/clinguide_maguide2nd_edition_en.pdf