Court hearing :( I’m terrified..

I have a court hearing for child support on Thursday and I’m really scared. I don’t know what’s going to happen and it’s making me throw up back to back I’m so scared. I know they can’t take custody from me, I’m not sure why im really scared, but I am. If you have gone to a court hearing for child support, what happened? What did they ask you? What did you need to bring? I’m so fucking scared PLEASE help me relax.