I was off birth control from June 30, 2010- and began retaking it July 9, 2010. On the night of July 9 I had unprotected sex with my boyfriend and he finished in me. My period was due on July 14th and it didnt come. I wasnt sure if this was because my cycle was messed up due to not taking my pill, or if I missed it because I could be pregnant. I am not sure if I would miss my period that close to conception sine it was only 5 days later. The two weeks before July 30, I was taking my pill but also taking antibiotics were lowered the effectiveness. Should I take a test? and how soon should I take it? Any suggestions or ideas are appreciated.