I'm sorry all of these things are happening at once for you.
Do you have any other close family/friends you could lean on for a while? What about your parents?
Yeah job hunting is tough for anyone but for someone in this situation as well, as few people want to hire someone who is almost immediately going to go on maternity leave. If you can hold out a few more months, it should become easier.
What about some work from home opportunities? Do you think any might be available to you?