Cycle Changing or Pregnant

For the last couple of months my period has been coming on time. I haven’t had sex in the past couple of months, until June 9th. And my period was due June 12th. I am now 10 days late. I’m not sure if my cycle is changing or if something is wrong. I don’t believe it is possible for me to get pregnant 2 days before my period. So I’m just wondering if something is wrong.

Has anyone had any experience like this and turned out to be pregnant? Or did your period eventually show up?