Must I make up the day on which I broke my fast after taking abortion medication and eating, believing it permissible, then came to know that fasting and prayer were obligatory because the blood was dysfunctional?

If a woman aborts a fetus in which human creation is not yet discernible (less than 81 days), then the flowing blood is irregular bleeding (dam fasad) which does not prevent prayer or fasting. If human creation is discernible, then the blood is post-natal bleeding (dam nifas). If you broke your fast believing it to be nifas, and then it became clear that it was irregular bleeding, and you have already made up for the fasting and prayer, then there is nothing upon you. Otherwise, hasten to make up for the prayer.