Hi , i am 14 years old and im wondering could i be pregnant . i have irregular periods by the way . so i had sex with my boyfriend on december 30 , 2008 and i took a pregnacy test on january 7th 2009 . the test was negative . i recieved my period on january 11th . it lasts up until january 16th . every since then i'm having alot of mood swings , i... more