Is it possible?

I had unprotected sex May 17th and haven’t been with the person since. I got what I think was a period at the end of May but it lasted 3 days. Usually my period is 6-7 days. Now my period is 2 days late. Is it still possible to be pregnant? How many of you went through that? I will take a pregnancy test tomorrow morning. I’m just curious if someone went through that.