WHAT ARE THE GUIDELINES FOR THE PAYING MEDICAL BILLS? MY EX IS ORDERED TO PAY HALF BUT ITS A FIGHT EVERY TIME AND HES SAYING IT HAS TO ADD UP TO 500$

The answer is in your order, and the order may be enforced. You should review the section of your order where it likely says that you are both to pay 50% of unreimbursed medical bills. If you have a standard order, your ex is probably also ordered to carry the health insurance or reimburse you (or the state) for the premium you pay for the child. A standard order says that you must give notice of the bill in writing. That may include email. In order to get your ex to pay, you may have to file an enforcement. The court will require that you gave him notice in writing so be sure to read the order and follow the instructions if you plan to proceed with an enforcement.