Hi, I had regular unprotected sex for a week before my period where my boyfriend ejaculated inside of me, aswell as during my period were he also ejaculated inside of me, all together he ejaculated inside of me 3 or 4 times in that time period. It is now 18 days since the first time we had sex, and roughly about 10 days after my period. I took a home pregnancy test and it turned out negative. I have been experiencing hot flashes, like my tempreture will rise and then drop again, nausia, but no vommiting, abdominal pain on my right side, headaches (minor) and a clear dischrage. My breasts are not sore but my nipples are sensitive. What are my chances of being pregnant?