I was recently diagnosed with chlamydia and then soon cured. I have a boyfriend and am on birth control and we have been having unprotected sex for about three months. I immediately told him to get tested because I figured he would have it too. However, his test for chlamydia came back negative. Now he thinks that I was unfaithful. How is this possible that we could have unprotected sex for so long without him contracting chlamydia from me?