My period is late. The last time I had my period was the 10th day of last month. I have been having unprotected sex with my boyfriend and I am not on the pill and we dont use condoms. He usually just pulls out. I took the first response pregnancy test a couple of days ago and it was negative! Is there any way that the test could be wrong? Or am I just not getting my period because I am paranoid about being preggers??