A couple days ago my boyfriend and I were messing around. He wasn't wearing any protection, and he ejaculated pretty close to me. My concern is that it may of landed on me. I was supposed to start my period four days from then, but I actually started my period today. Since I started my period, does this mean I'm probably not pregnant? Or since my period started so soon does this mean I probably won't know until my next period? Lesson learned. Next time protection will be used. Any answers are greatly appreciated. Thank you:)