So my boyfriend and I have been having sex. And I was a month late with my last period, so we thought I was pregnant. Turns out I wasn't. But that was at the end of November. That was my last period. I missed Decembers and I missed January's (this month) he thinks I'm pregnant (because of that and thaty breasts are getting bigger and sore.) But i told him that it could also be from other things. But what other things could it be?