I say, and with God's success: The menstrual cycle can be advanced or delayed in time, and the small amount of blood in all its colors is considered menstruation, and the purity that occurs during the days of menstruation is also considered menstruation. The minimum duration of menstruation is three days, and the maximum is ten days. If it is less than three or more than ten, it is considered irregular bleeding. In your case, you should combine the days you saw a small amount of blood with the days of blood cessation and the days of blood return, and all of these will be considered menstruation. If it exceeds ten days, you should revert to your usual cycle, and the menstruation will be counted according to the number of your usual menstruation days. And God knows best.