I'm pregnant and I've been fired, what now?

First thing: you must inform the company of your pregnancy. If this pregnancy occurred during the period in which you were already pregnant, you have stability under the CLT, which gives women a guarantee that they won't be fired during their pregnancy. So it's important that you go to the company and inform them so that they can bring you back. If this doesn't happen, you should certainly go to a lawyer, and then the lawyer will file a lawsuit, informing you of the pregnancy and, probably, the judge will ask for you to be reinstated in the company, with all your rights, including after the birth of your child. That's good! I hope I've helped.