Hello dear, I understand your concern. In my opinion delayed periods can be there without pregnancy. There are various reasons for it like thyroid abnormalities,PCOD,overweight or obesity,anaemia ,stress etc. As the irregular periods are present I suggest you to consult doctor so that the above causes are ruled out. The investigations like Hb,thyroid profile,ultrasound might help in diagnosis. If overweight or obesity weight reduction is helpful. Avoid stress if any.And adapt healthy lifestyle like healthy nutritional diet and exercise daily. Nothing to worry.Once the cause is treated cycles might become regular. Relax. Hope this helps. Best regards...Dr.Srilatha