Go to court well in advance of the scheduled hearing, and file both forms concurrently. If your ex parte request is granted, the judicial officer will sign the DV-110 order.
Provide the clerk with the case number of the existing DVTRO, tell them that you are seeking your own DVTRO against that party, and that your request shall operate as your "response." The hearing on both requests will be consolidated for the currently-scheduled hearing date.
Per statute, the date of the hearing must be 21-25 days after the issuance of the DVTRO, not 4 weeks, and personal service must be effectuated upon the restrained party at least 5 days prior to the hearing.
You will need to file the DV 100 asap. You will also need to complete the DV 110 and bring it with you to court to request the TRO pending the hearing.