Lots of things missing in this story. She can't have a temporary hearing without serving you. So, that doesn't sound right. It sounds like you have 50/50 or more placement. The court is going to try to maintain status quo, she will need a reason to change that. To do so, likely she will need something to have gone wrong in your household. You do need to get your hands around what is going on.
I suggest you go down to the clerk of courts and ask to read the file. They will let you do that, and you will then know what she is asking the court to do. You must start there. Then come back and ask questions.