Can sex delay your period?

So back story, last month I was travelling and got my period 3 days earlier than I should have probably because of the climate change and everything.

Now, I got back and on the day when I should have had my first day of period by calendar, I had very protected sex. But, here I am, fourth day later, my period is nowhere to be seen. I’m having a hell of a PMS where I’m feeling spazams and bloating all over my body as if it’s going to explode any minute. I figure that my period is late because now I’m adjusting back to the old climate, but then again, do you think having sex might have had something to do with delaying my period?