Must a woman who has been married for ten years repeat prayers and fasting if the new fatwa stipulates that the brownish discharge at the beginning of menstruation is not considered menstruation unless there is a gush of flowing blood, especially since birth control pills cause the discharge of brownish fluid and streaks of blood for 6 or 7 days?

What a woman sees of yellowish or brownish discharge during her usual period is considered menses, even if it precedes the sight of blood. What she sees of such discharge outside of her usual period is not considered menses. Based on this, you are not required to make up the prayers you missed due to seeing yellowish or brownish discharge if it occurred during your usual period. However, if you missed prayers due to it outside of your usual period, there are two opinions among scholars regarding the necessity of making them up. The majority of scholars hold that making them up is obligatory, and this is the more cautious approach.