I had sex on May 3rd. The first time my boyfriend and I had used a condom, but as the night went on we were drunk and we had not used the condom. He did use the pull out method, but I'm not sure if he did it right since we were drunk. 2 days later I started feeling very nauseous and it has lasted ever since. I haven't thrown up at all, I've just felt like I've been on the verge to. I've also been experiencing extreme exhaustion/ insomnia, diversions with food, back pain, abdominal discomfort, extreme mood swings. I was enraged because my mom took my pen earlier and I don't know why because I'm the easiest going person ever. Yesterday, May 11th I started bleeding. I thought it was my period but usually I have very heavy periods and the pad has not filled up in even a day. I also always experience horrible cramps which has not been the case either. Could I be pregnant?