I took an unwanted 72 on 24 th Oct after an intercourse on 23 rd Oct after that on 7 the day there was withdrawl bleeding for 3days and my cycle date is 16-20 every month,but it's 27 Nov today(10 days after my periods date) yet I did not get my periods. I took prega test but it's negative. What should I do.. but my periods during winter usually gets delayed by 10-15days or less (periods are not on d same date every month usually gets delayed).. is there anything to worry about? But even I'm experiencing premenstrual symptoms like lower abdominal pain... should I wait for sometime more or consult a doctor? Is it dat Serious?