Hello dear I understand your concern If you have not intercourse then pregnancy is not possible. To become pregnant, penetrative sexual intercourse is require in fertile period of the cycle. Your missed period could be due to stress, hormonal imbalance, chance in lifestyle and dietary habit, thyroid dysfunction. Waai for the period to come. If it will delay by the 8-12 days then consult the gynecologist and undergo reproductive & thyroid analysis, USG scan to confirm the cause. Meanwhile avoid stress, take healthy diet fresh fruits and green leafy vegetables, drink plenty of water, do regular exercise. Period can be induced by progesterone pills hormonal imbalance. Hope this may help you Contact HCM for further health query Best regards Dr. Sagar