My bf went with me to the dr about a week ago because I had strep throat and while I was there I got them to run a pregnancy test (we had unprotected sex early last week, he pulled out but it was a VERY close call). The pregnancy test came back negative, and since then we've obviously been using protection. My period was supposed to start sometime around the 17th... still waiting around. My real question is just this (I read through the stickies but I don't know if it says this anywhere). If a doctor's pregnancy test says nego... how likely is it that I still might be pregnant? (False negative?) Is this something I should likely be freakin about?