If you truly have not paid child support under a known court order to do so then the court could very well find you in contempt of such order fine you, jail you and mandate that you adhere to the order in effect.The court could also order a wage garnishment upon your pay check to enforce compliance with the order in effect against you. The court hearing you have coming up is a serious proceeding. I suggest that you retain a family law attorney to assist you at it.