hi plz rule out tuberculosis also. get a hsg done to see if tubes are functioning properly coz many a times secondary infertility can be associated with this. Another possible cause of irregular periods -- being overweight, or underweight, can cause a disruption in your menstrual cycles. Both being overweight, and underweight, can also cause anovulation. Extreme exercise and extreme dieting are more potential causes of irregular cycles. In this case, losing weight may be enough to regulate your cycles again, increasing the chances of getting pregnant naturally. If extreme dieting is the problem, changing your diet to a more balanced plan, and even gaining some weight if you re underweight, can help regulate your cycles. bbyeee