Pregnancy from pre-cum? 😭

Hi everyone, me and my boyfriend had a freaky time together on the 24th last month (24/02) . However, we did not do any penetration. But we did naked rubbing so I suspected that his pre-cum may on/in my pussy. I did take the emergency pill the next day. According to my period tracking app, my fertile window period was between 16th-22nd. I am now very concerned that i might be pregnant as my period is not coming yet as i should have my period around these time (today date: 06/03). Plus for the past few days i have been having nauseous which I don’t know whether I am too stressed or because of the food I ate or because it is a pregnancy symptom. Everything is my first time, so I am quite anxious. Please help this girl out 🙏🏻😭 any advice is all appreciated.