Hi, i am 18yr old.  My last period was on 2nd March.  And before some 2-3 months i got my periods regularly and continuously on the 28th day.  And this time it is getting 35days late and i did not get my periods still. Also it never happend like this before.  I and my boy friend had a small fun during which we did not use any protection . I also felt that my vagina was not easily opening. I had cramps in my stomach(as though my periods are going to come ). I often felt that there is some thing coming out (periods) and i go check up but there wont be anything.  I am really so stressed now.  I am not able to concentrate in any of my works.  Will my periods came?  Can u please help me?