What should a woman do regarding her fasting, prayers, and treatment of her husband during the period when she experiences intermittent bleeding after 13 days of purity and before the clear onset of menstrual blood, knowing that the beginning of this bleeding might be irregular and not true menstruation?

The first drops that appear for four to seven days and are connected to the usual menstrual blood are considered menstruation, as long as the total number of bleeding days does not exceed fifteen days. The default ruling for blood exiting the womb is that it is menstruation, unless it exceeds the maximum duration of menses. The minimum period of purity (tahr) is thirteen days. If bleeding resumes after this period, and it lasts no less than a day and a night and does not exceed the maximum duration of menses, then it is considered new menstruation. If bleeding resumes before thirteen days have passed, it may be considered a continuation of the first menses or istihadah (non-menstrual bleeding).