Since you have no idea of where she or the child is, the courts will most likely NOT address the issue of custody, support and parenting time.
All you can do is file for a divorce, try to have her served at her last known addresses then request service by publication in the town of her last know address.
I would recommend that you hire an attorney and since this will basically be an "default" divorce, shouldn't cost you a whole lot. But note...it will take a minimum of 6 months before this ever sees the inside of a courtroom because of the service issue.
If you air your dirty linen in public, expect people to comment on the skid marks!