The intended effects of the abortion pills are to cause bleeding and cramping [1], thus ending an undesired pregnancy. If you do not bleed after using the abortion pills, it is likely that they did not work and you are still pregnant.
Sources
[1] 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