My cycle begins on 25 august. I had took ipill on my 5 day of my cycle after having sex in 4-5 hours. After 3 days I was started having light bleeding for some days. But this month my periods have not came yet and it has been delay for about 12 days. I am having some white discharge also from vagina from some days earlier. And I tested urine test also it shows negative result. What is the problem? Why my periods not came yet?