You've probably gone to court already. If you did, I hope it went well.
I wish I had some advice for you on staying calm. I know what you mean about getting physically sick. I also tend to ramble when I get upset, and court is no place to let it all out. I had a very good friend who went with me and told me that whenever I started to get nervous just to look her way, and she would calm me down. Fortunately I never had to face the judge, just my XH and his lawyer. I was afraid he would bring someone with him too, but he was alone. I'm guessing your H won't have the guts to bring anyone with him. They talk a good game, but they are really scared of anyone finding out exactly how they have been behaving.
My kids were both too young to even think about going with me, but if your son is mature enough, and it won't hurt him to be there, it might be good for you to have him with you. Otherwise, if you have a good friend see if they can go with you. It's a hard thing to face alone.
I would dress to the nines, it always boosts my confidence.
