Am I pregnant??

I'm interested in your opinion. So, my period is late 7 days, i had unprotected sex with my SO but he only put it few times, we didn't go all the way. Today we had sex with condom and after that I felt vaginal pain and later I discovered that i have light pink spotting and i read that it could be a simptom of pregnancy. I have only 18 years and I'm not trying to concive so I'm really scared right now. I'm planning buy a pregnancy test tommorow.