I don't believe pregnancy gives you any immunity from this. Also, usually it takes months before somebody is actually ordered removed, so you'd already given birth by that time.
I'm sorry you're going through this. I can see your husband's point filing with a lawyer but the timing is tight... When you go on that call make sure to raise your concerns with lawyer. I'd want to get reassurance from them they'd jump on your case immediately. Meanwhile, did you get all evidence collected for AOS? Maybe you can scan it, organize it before meeting lawyer. You can also draft responses on forms and go with a lawyer through answers.