R.M.
I don't think that any of us ( unless there is a child custody lawyer from your state that is reading your question) can really give you an adequate answer to all of this. If you can't afford a lawyer, go to the local legal aide society or if there is a law school in your area, go there and see if they don't have a law clinic that is run by the Law Students, they will take cases, based on what you can afford to pay and represent you in court. They are supervised by their teachers, and it is an excellent system.
I hope that whatever decision is finally made that both of you can put the interest of your child first and not make it about "getting back" at the other parent. I work with a Mother who unfortunately has a terrible, hate filled relationship with her exhusband and their 13 year old son is the one taking the bulk of the pain from it.
Good luck to you