My last period was on 9-14 october 2012. on 20, i had unprotected sex......my bf was sure that he didnt ejeculated inside me....but on safer side i took ipill on 21 october. Now on 26th i have received bleeding which lasted for 55 days and was lighter than my usual period. Now from 11 november, i am receiving light brown bleeding which is very very less in amount. what is it?is it a implantation bleeding?plz plz help.