Hello, Diet control may impact on your regular period. Late period could be due to hormonal imbalance, mental stress, extreme loss, emotional upset, irregular diet habit, high prolactin level etc. You must undergo one pelvic ultrasound scan and hormone test to pinpoint the diagnosis. You may require hormonal pill and other supportive medication to induce period. Kindly, consult with your gynecologist and take suggestive advice accordingly. You should control body wt, avoid stress, take healthy low carbohydrate diet with avoidance of fatty food and sleep properly. Be well.