Are the days of menstruation counted as eight days, with no attention paid to the yellowish discharge that comes after them, and what is the ruling on the yellowish discharge that comes after ritual purity if the menstrual cycle is irregular?

Yellowish or brownish discharge is considered menstruation if it occurs during the habitual period or is continuous with blood. According to the Hanbalis, a habitual period is established by its repetition three times. So, if the days of bleeding have been repeated for eight and a quarter days, then any yellowish or brownish discharge during this period is considered menstruation unless it exceeds this period or is continuous with blood. As for the second opinion, which is the one given fatwa, the habit is established by a single occurrence. If you are afflicted with obsessive doubts, then act according to the easiest of opinions.