Hi ,

i had unprotected sex with my boyfriend and have taken the ipill. I had sex on the 13 th day . I am 2 days due for my periods and experiencing cramps like i normally do for my periods , but have not got my periods yet. 

I have also tested negative on the home kit pregnancy test. I feel dat my periods would be delayed . 

can i experience a delayed period ?for how many days and how do i safely assume dat i am not pregnant by the home test pregnancy kit