Moving homes at 30 weeks

So, my family and I have been in the same house for three years. We were originally on a lease but, when it ended, the real estate company agreed on us paying on a month to month basis.

Saturday we received a letter stating that they are no longer honoring our month to month deal and that we have thirty days to vacate.

They know I'm pregnant. They know I've got two small children.

Honestly, this wouldn't be a giant problem. IF my husband weren't in the military and already scheduled to leave from 24 March to 7 April.

I will be moving mostly by myself. Has anyone else gone through this? I need reassurance and support that everything will turn out OK. We've never been late on rent and are good neighbors. I don't know why they are evicting us.