How long after sex should i take a pregnancy test? will birth control or plan b mess up the results?

Take a test: Anyone having intercourse without birth control or condoms may get pregnant. Home pregnancy tests are very accurate. They are the same tests used in a doctors office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. Plan B and birth control does not interfere with a pregnancy test results