I started taking th noristerat injection on April 2012 and took my last in August 2012 and was supposed to take another in October but I didn't.. whilst taking th injection my periods never stopped,had them almost evey 2weeks and I still have them that way even after not taking the objection last month-October.and I'm still on my periods and had unprotected sex 2days ago-early Saturday morning,is it possible that I may be pregnant?