Hello dear, Understand your concern. But sometime pregnancy kit give false result so repeat after 5 days to confirm or you can do blood HCG level or USG that is very specific than UPT. Following are the reason for late period: change in dietary habits, Change in life style, Late ovulation, Excessive weight gain /loss, Drugs: Birth control pills, tyroid medication, Excessive tea and caffeine Thyroid problem Hormonal imbalane, PCOS, Endometriosis, Dysfunctional uterine bleeding Also note that Menstruation required co ordinate action of various hormone that secreted by ovary (estrogen and progesterone) and brain (FSH and LH). If any above hormone is decreased or increased there is imbalance in menstruation. So please do full hormonal profile : Estrogen, progestron, LH, FSH, HCG and thyroid hormone. That help to diagnose hormonal imbalance. Also do Follicle study, endometrial biopsy and hysteroscopy. Take more frequent meal rather than large meal Relaxation exercise and musical therapy Do regular walking and exercise. Eat healthy diet Avoid excessive tea and caffeine Wear loose pure cotton inner wear Keep the vagina clean (Not wet) After confirmation you can take treatment according So please go ahead. Hope this may help you All the best. Stay healthy. Best regards Dr. Sagar