<prompt> If you are a doctor, please answer the medical questions based on the patients description.My periods are always quite regular , last month got the periods three days earlier that is on 4th Feb ,and later on march first had unprotected sex...took a pregnancy tests has periods were delayed , once or twice vomited , also had nausea feeling , headaches ,tests twice were negative but 20th march got my periods ..still feel the same ...is there are any chances i am pregnant ..or is it any other health issue..since i have never had periods delay so long ...  <response>: Hello, Here, you need to undergo one blood test for beta-ChatDoctor to rule out product of conception or miscarriage. TVS scan gives some additional information. Other reasons of irregular period are stress anxiety, hormonal imbalance, pelvic infection, over wt, irregular diet pattern, uterine pathology etc. Consult with your gynecologist for proper examination relevant investigations. Take suggestive measures accordingly. Practice safe sex in the future. Good luck. 