My last period came march 14, 2013 and since then my period has not come . I have sensative sore breats and cramping alot when I have to urinate or feeling sick , I pee like every 45 mins to an hour. This is week 5 my period hasnt come , I took a test at home and it was negative. What does this mean ? I have been sexually active on march 30, 2013 can I be pregnant ?