My periods are always regular always come on date last time i had on 15 and today is 31th i still not get my periods i have done 3 times urine pregnancy test first on 21st and second and third on 25th three of them are negative after that i have taken primolut n i have completed the course of 5 day still didn't get my periods and worried plz suggest what should i do am I pregnant? Aur i have some other issue?