When Will Periods Come After Taking I-pill?

hello, my name is vaishali...

i got ur e-mail id from the website of i-pill. i have a problem to share with u, can u plzzzz give me some suggestions.

i had unprotected sex with my bf and i took an ipill within 72 hours. after taking i-pill, i bleeded after a week around 26th feb 2011. Today is 9th april. it has been more than a month, i have not had my periods again. i have done the pregnancy test twice and the result is negative.... when will i have my periods again? what should i do to have my periods again...

plz reply quickly, i am really worried....