Around 20 days back, I got intimate with my partner. It was my first time and there was no intercourse plus we used protection the whole time. There was some ejacu**tion but it was nowhere around my va**nal area. Now I'm five days late (according to my periods tracker) and I know I can't be pregnant, but still stressing a lot. Can that be a reason for my late period? I got my last period on 20th August and sometimes I get my next period exactly 30 days later, but I'm still stressing a lot.