Can i be pregnant while on depo provera?

Patient: Hi i will like to know can i get pregnant off of depo shot…ok i got my first depo shot in june2011 in i post to get my second shot in sept2011 but i miss the shot on monday 19.2011 and i been sexually active most of sept2011 and i been sleeping more than usual after two weeks.should i go to the doctor’s in get tested.