I had unprotected sex with my bf and later i took unwanted 72. I got my periods after five days . Later my next cycle is expected 25 september . But it is still delay. Then i took pregnancy test after 7 weeks of having sex and it is negative. But the periods are still missed already more than two weeks passed. Is there any chances of pregnancy? Urine test is negative . How one can retain his periods after imbalanced hormones ?