L.M.
You lost me "I was advised by her CPS lady not to attempt to get my son". Did CPS take your son? Where is your son now?
You probably did do the right thing by allowing them into your home. It shows that you have nothing to hide and that you're willing to cooperate with them.
I really don't understand what your asking. My only advise would be to document everything. When and IF you get served with any type of papers, at that point I would contact an attorney, even if it's a public defender.