My boyfriend I had Intercourse 3 months ago it was protected sex though and it was my first time. I got my period the month after and then the next month I got it 1 weeks late and now this month I'm 20 days late. Though I had a really bad argument in where things got physical and from so much anger my body was shaking and on top of that all this month I've been sleeping late due to summer school which was a very hard subject to take in the summer so there's been a mix of stress and sleep deprevation as well. And thinking that I haven't got my period makes me street out even more..