Hello doc, my periods were due on 12 July, I had unprotected sex on 8 July. I took an I pill within 6 hours. Periods did not come on 12 july but on 18 July I got withdrawal bleeding or period for 3 days. After tht I have not done anything. I did home pregnancy test 3 time and blood test as well. All are negative. But I dknt know why my next periods were due on 12 August, but have not come yet, I went to doc did urine test, its negative. I am worried because of my periods. Its 11 days up now. So she gave me progestomac and estomac. I have started them on 21 aug and finished on 22 aug. When my periods will back? Is it sure tht m not pregnant. please help. Thnx.