Trying to get preggers!

So, my fiancé and I have been trying for 6 months to get pregnant. Every month when I get my period it just destroys me. All he says is we can just keep trying. We've never used protection, is it normal to not have gotten pregnant in 6 months?? I'm debating on going to the doctor to see if there's a reason I haven't yet. I just need opinions!! Thanks :)