[Divorce] middle aged man in child custody battle with no more than 400$. I need help

I am really out of options here. We are not divorced so there is no type of child care plan. In order for me to see my child I had to live with either her mom or her dad. Well one evening her dad freaks out on me and it no longer became safe for me to stay there. So I moved out. I haven't seen my son since. This goes back 8 weeks. His birthday is monday. Between my house payment and bills I virtually have no money left over to afford an attorney. I have shit credit and no way to make more. I have 450$ to my name outside of that and anyone that could help has. I called legal aid in my state and they denied my case for unspecified reasons. I am at a loss. As a result my son is being kept from me. His grandparents will not let him talk to me because for fear that they would be denied the right to see him. This is the type of person she is. I need your help.