I had unprotected sex 5-6 days after my period ended. His penis was mostly flaccid as he could not keep it hard, but he still put it in after a few tries. Penetration only lasted for a few minutes because it kept slipping out and he told me he did not ejaculate. Now, after aprox. 3 weeks after, I started noticing that coffee made me very nauseous in the morning, which has never happened before. It is true that I have unhealthy eating habits and I'm very stressed because I have exams at uni, but this still freaks me out. I took a pregnancy test and it came back negative, but I'm scared it's false because although I did it only 2 hours after waking up, I drank some water and some coffee. My period is also late by a few days, but this could also be because I'm very stressed. Can it be possible that I'm pregnant? Please help, I'm terrified