I had several of those with dh's pbfh. They suck. Basically, you have to present your case as to why you need it. She needs to present her case as to why you shouldn't get it.
Bring witnesses -- whether or not they'll be allowed I don't know. From what I went through, it seems as if it's up to the judge. Also, in some hearings, we were sworn in individually and sat in the witness box, in others, we were both sworn in at the same time and sat at the counselor tables.
You need to make your case -- that you're afraid that she'll assault you again and that you are concerned for your welfare as well as that of your child's. What if she goes after you while you're holding your child?
That's about the best that I can tell you, spinner. You CAN have an attorney I believe if you want to spend the money. SHE might, I know when pbfh#2 filed one against dh, we hired an attorney to fight it.