Moving while pregnant?

Heather • 24, lover of animals. Happily taken and expecting dec 2015.
I'm currently 26 weeks, and in a tough situation. I'm completely miserable living in the state that I am. My boyfriend and I struggle endlessly, and none of my family is here. It's come to the point where I've cried myself to sleep on several occasions from just being down and out over it all. So recently I brought up moving back to our home town. While he's against it, his mother is trying everything in her power to get us to stay. I was hoping to move back by October, since I'll be due in December. She wants us to at least stay until after the baby is born, which I think is a horrible idea. Has anyone else ever moved that far into pregnancy?