Hello dear Understand your concern Yes delayed period may be due to pregnancy in sexually active girls. But it should be confirmed by urine pregnancy kit , 7-10 days after missed period. Or by blood HCG or USG that is more confirmative. So if pregnancy is confirmed manage accordingly. Also note other cause of delayed period: High level of stress, sudden Change in life style, Late ovulation, Excessive weight gain and loss, Drugs: Birth control pills, thyroid medication, Excessive tea and caffeine, Thyroid problem, Hormonal imbalance. Advice are below: Do regular walking and exercice like yoga, stretching and relaxation Eat healthy diet with vitamin and mineral supplements Eat fruits like papaya, orange, pineapple Maintain weight Avoid stress and anxiety Use safer sex practice to avoid unwanted pregnancy 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 and USG 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