My son's father and I have a court order right now that says he has 80% physical & 50% legal custody, I have the rest. In February 2012 we agreed outside of court that the child would live with me 100% of the time. He told me he did not want to have a child support order and that if I was patient and worked with him he would help out financially. He has provided barely $800 total to me since then. He has threatened me that he will take my son back from me if I try to file for child support. What should I do?