Hi, my cycle usually falls around the 9th, this month I had what seemed more like break through bleeding that barely lasted 24 hours and that was all, a week to 2 weeks prior my boyfriend and I had unprotected sex. I ve taken a home pregnancy test, which came back negative, yet even with my last 2 children, Home pregnancy tests didn t show that I was pregnant until I was about halfway through my first trimester. Is it possible that I could be pregnant?