My frnd do sex on 28 tht time her boyfriend use condom during the sex but my frnd period date is 29 her last period date is 29 june till today her period was not come she also have the pcod lst year she take the treatment also after take the medicine for 3 months asmita the period was regular til 29 june but after 29 till today her period was not come my friend take the pregnancy test on 5 august n test shows its negative but she is worry why the period is npt come till now please help us.