Jennifer,
You're about at the same stage in pregnancy that I am

. If you miss your family you could call them and tell that you love them and miss them. You could also move back home. That might help ease tensions with your boyfriend also. I am glad that your boyfreind is bieng supportive of the pregnancy. Mood swings are common in pregnancy. I have probably been more emotional too and it seems like my husband is more moody as well (not sure how that works). Have you talked with your boyfriend about how you have been missing your family and feeling lonely? Hang in there!
Kate