Im 23, I been having a unusual period for the last 2 months its been very light,spotting, and it was only 1 day and a half. This not normal for me I usually get a heavy period and it last from 3-5 days. Im not on birth control and I been having unprotected sex with my boyfriend. I had a misscariage about a 1yr ago. I've taken 3 pregnancy test and they have came negative. Is it possible that I'm pregnant?