Can my period be late due to traveling?

Lily

Okay so I wanted to add this first and then my problem. I had unprotected sex in the beginning of my period only once for like a few second and stop since I felt like I need to shit. After that about two weeks later I left to Japan for a week. A whole new timeline and huge travel and while I was gone I was supposed to expect my period to come, it never did. It is now 4 days late is that normal? Or can I be pregnant? I have receive no signs of any pregnancy symptoms so I don’t know if I want to take a test as i had unprotected sex during my period before.