Ok me and my boyfriend had protected sex on may 28,and june 6 and one more time after that maybe like 2 or 3 days...Anyways I started my period on may 5 and I havent had one since then...I used two ept test and both were negative...One was on day 10 of being late and the other on day 15....Should these tests be accurate? I dont have any symptoms or anything just no period!! What are the chances of 2 hpt's being wrong?