I have had really bad dreams about a baby boy dieing and it really scares me, I lost my older brother when I was 9 so I think that really bothered me. And I'm having a healthy baby girl(: I'm now 26w1d(: they have all stopped now thank goodness.
My first pregnancy I had dreams I was having a girl, ended up being a boy...my second I had dreams that I was having a boy, ended up being a girl lol :-)
Pregnant women can have odd dreams, LOL. Those don't mean anything sweetie. I had some of having miscarriages but those were just me worrying too much. I am now 17 weeks and everything is fine so far. Whatever the baby is, you will love it. So just wait and find out. Don't have your heart set on one or the other.