Hi. I'm feeling confused. I recently have been sick for about probably a month now and my doctor gave me an antibiotic.  I finished out the anti. knowing the effects of it reducing Birth Control.  When I didn't get my period on the day it was supposed to be it was strange, I've never been late.  Then remembering the effects on birth control I waited and waited. Waited a week took a pregnancy test... came back negative.  So I continued to wait, no sign of spotting or anything. Waited another week took another test... came back negative.   I don't know what I should do or what's wrong..