Taking Red Gold Anti Knotting Tablets will rarely cause delayed menstruation, because this drug mainly has the effect of activating blood circulation, eliminating blood stasis and dispersing knots, the vast majority of which will not lead to delayed menstruation, and may cause early menstruation. If you are not pregnant, you can continue to observe for a week, and if you still don’t have your period, you can take a urine HCG test again if necessary. If the result is still negative, it is recommended to take progesterone to promote menstruation, it is likely to often stay up late, irregular life or environmental changes, causing endocrine disorders and lead to delayed menstruation.