<s>[INST] I am married for 6 mnths now.I am 27 yrs old. I did not have much menstrual issues in the past years. But last month i had my 10 days delay in my period and again now it is 16 days now but my period has not yet started. Please help me on this. Is this my pregnancy or any hormonal issues. If this is not pregnancy then will it call cause any problems for my pregnancy later. Currently i m feeling very tired and low in energy. Feeling very pale and drousy all the time. please suggest. [/INST] Hello dear, I understand your concern. In my opinion there are different causes for irregular periods like:-1)Thyroid abnormalities.2)Polycystic ovarian disease (POD).3)Overweight or obesity.4)Stress.5)Anemia.etc. So all the above causes should be evaluated by getting done physical examination and necessary investigations. Ultrasound helps to rule out POD, thyroid profile helps to rule out thyroid abnormalities and HE to rule out anemia. If overweight or obesity weight reduction helps in regularization of cycles. Weakness, tiredness and paleness symptoms are suggestive of anemia.HE helps to rule out anemia. Avoid stress if any. Nothing to worry. Once the cause is treated the cycles become regular. Relax. Hope this helps. Best regards..... </s>