When it was assigned a judge on 8/14 what happened? Was it continued? DO you have a different date?
You need to find out what happened ....she might have dropped it since you did not file?? Call the court and see if it is still active. In my state you can look up your case on-line.
Regardless if the case is active/in active, I would do what the other poster said, file for ex parte hearing this week and get an order to have child remain in the state, file for custody, AND file contempt for this past weekend. All this is separate filings...so make sure you do them all so that all will be heard. The ex parte will he heard that day or this week and the judge will make a ruling if child must remain in the state and same school.
Like I said before, you can do the paperwork yourself on MOnday at the court house....
When you hire a lawyer be very careful. State what you expect, what you want filed (have it typed ready to hand them), how you want to communicate with them, how fast they return phone calls. Many lawyers will talk the talk, take a couple of thousand dollars from you and drag this out for over a year..It sounds like you are already in this with the home study done so you just need to make sure that what you did is the legal way to do it, especially if she has a lawyer.
Make a list of why it would be best for child to stay with you: same school, friends, dad, family (Is mom family by you too...can add that)
Reasons for mom to move: new husband, (did she work before? did she quit her job? did she get new job? no family?)