I always had unprotected sex this month however I started my period on the 23of July 2012, its now the 24th of Aug and no period, I've had tender brests mild nausea some pelvic pain also, I took a pregnancy test it came out negative. Could I be pregnant? Im 21yrs old.. I'm scared of the possibility of me being pregnant from the times I had unprotected sex before but pregnancy test says negative :/