Hi.. Am currently on birth control(injection Norigynon)my appointed date was the 27 of Feb but was I was 5days behind..yes I did engage in sexually activity..one day before my appointed day(26)unprotected sex..and after my appointed date.unprotected..am usually not irregular on my period bt now am 1week behind..please note dat I have taken my injection on the 2nd of march..can I be pregnant??