What does certificate of discovery mean? currently going to court for custody.

The non-custodial parent filed for full custody, child support, and visitation. I have temporary full custody due to a domestic violence protective order. I don't have any money. We used to reside with the non-custodial parent. The non-custodial parent has a high priced attorney.......I really need help!!! If anyone can be of some real help I can explain this whole senario from beginning to end.