Must the questioner make up the prayers she performed after her ghusl while still seeing light drops of blood, out of ignorance, and would she be sinful if she adopted the view that an ignorant person is not required to make them up?

A ritual bath (ghusl) performed due to menstruation before verifying its cessation is not sufficient. Therefore, according to the majority of scholars, it is obligatory to make up the prayers missed before performing the ghusl from menstruation. This view is closer to the principle of caution (ihtiyat). However, it is permissible to follow the opinion of Sheikh al-Islam Ibn Taymiyyah, who held that making up these prayers is not obligatory.