Yes, you can file a motion yourself. You can serve the other party (actually, serve the attorney) by mail, and file it by mail. You can probably resolve the issue over the phone before the hearing.
Here is the format you should use (I am an Indiana attorney):
VERIFIED INFORMATION FOR CONTEMPT
REGARDING PARENTING TIME ORDER
Comes now the Petitioner, pro se, and states that the following:
1. That this court issued an order dated (DATE) whereby Respondent was ordered to pay XXXX.
2. That as of XXXX Date, no payment has been made with regard to the dates if XXXX.
3. That Respondent has violated this Court's Order by refusing to pay as ordered and attempts to resolve this issue have failed.
WHEREFORE, the undersigned prays:
1. That the Court order the Respondent, NAME of RESPONDENT, to appear and show cause why this Court should not
punish her for said contempt of Court.
I affirm, under the penalties of perjury, that the foregoing representations are
true to the best of my knowledge and belief.
I hereby certify that I have sent a copy of this Petition by first class mail to
the opposing attorney, or the opposing party if the opposing party is not
represented by an attorney, on ____________________________.