I had a miscarriage on Sept 2009 and since then i being trying to get pregnant. I try to have sex every other day for the most part but i still have not gotten pregnant. I usually get my period for 5 days each month. I got my period March 11, 2010 and it was regulate but it only lasted until March 13, 2010 and it was like a dark brown towards the end. Could i be pregnant? and If so how soon can i take a pregnancy test? the last time i had sex was March 6.