my mother have custody of my child my baby mother not paying childsuppor to my son when both supose to be paying childsupport only me is paying i need

Well, you can certainly file for contempt on her part and have her back pay the amount she owes. While at the same time you can petition for child support modification to get the child support payments reduced based on circumstances if there has been a significant change in your income.  Above answer and comments to questions are for general purposes only and does not constitute legal advice or establishes an attorney-client relationship without a signed retainer. Please reach out to an attorney you are comfortable with working and discussing your case in more details. If you can not afford a private attorney, you may be eligible for a Pro Bono lawyer provided by some courts and if not, feel free to ask about our affordable payment plans.