hormonal imbalance,excessive daily intake of alcohol and smoking, taking foods with less nutrition and stress etc....if its stress related and due to poor nutrition following a well balanced healthy diet with daily morning regular brisk walking, yoga and meditation is helpful.Hormonal imbalance like thyroid abnormality can result in irregular periods so treating the cause improves the condition or PCOS( polycystic ovarian syndrome)can also be a cause. If its a PCOS, you may also experience pimples, weight gain, excessive hair growth on your body,sometimes even depression will be there, based on the history you are mentioning I am suspecting hormonal imbalance, so kindly consult a gynecologist for further management.

Hi there...I can understand your concern. Irregular menstrual cycles can be due to many reasons like anaemia, thyroid disorders, pcod, fibromas, stress, drug intake. You will need detailed clinical examination and further investigations including ultrasound abdomen and pelvis, hormonal profile. So kindly consult a gynaecologist for further evaluation.