So I started a job four days ago n got fired over someone saying I was moving slow and not doing…

So I started a job four days ago n got fired over someone saying I was moving slow and not doing anything. Just standing up and sitting down and blamed it on my pregnancy.When the lady daughter was sleeping and throwing up. But the lady went to management n lie on me. I'm mad as hell cause they fired me through my mother in law and then go say I can go back to work if I can get a note from my doctor saying I can work.