My period came on around aug 14( in which it was a week early) not really sure the date just know it was on 14 of aug...but i know it was off by aug 20 which was when my boyfriend came home from work. We are tryin to have a baby so we do not use any source of birth control. well my period came back on sept 3 which makes it about two weeks later. not a normal kinda slow. really tender breast. could i be pregnant????????