Finally told my new boss

So last time I made this post I was nervous to tell my new boss I was pregnant because the job I had prior fired me an hour after finding out I was pregnant. So I built up the courage. I went and spoke to him in his office. He congratulated me. Said I was doing a great job here and that afterwards if I still wanted a spot here that he would save it for me , for when I was ready to come back. So relieved. So excited. I finally felt like things were looking up......... three days later he fired me because my future availability didn’t work for him. Next job I get, I’m not saying a thing. Jerks.