Pregnant ?

I never thought I would be having to do this post but ahhh I need help. So I had unprotected sex literally for like 5 seconds on Jan 12. My last period ended on Jan 3. I went to the doctors and got a pregnancy test done and ultrasound because I was having stomach issues on Jan 21 but I’m not sure if it would of shown that I was pregnant that quickly. I was supposed to get my period Jan 28 but I’m 2 days late. What do you guys think? 😬😬