So I had very unprotected sex on the 19th of December which happened to be while I was ovulating (we may have been a lil drunk). I know, trust me, my bestie has ripped me a new one for this one but hey, sh!t happens. My question is I was supposed to start my period today but I haven't and I have taken 4 pregnancy tests and they all have come back negative. Is two weeks too soon for a pregnancy test? Or should I go by what the tests are saying?