It appears you are being lined for CAPTA techniques being used against you to remove your child from your life.
The Child Abuse Prevention and Treatment Act send federal funds for state child protection. Drug use by a parent triggers a child neglect proceeding. However, you are not entering a neglect proceeding: the divorce is going to feature an allegation of neglect and the court will be asked to apply CAPTA techniques to regulate your access to the child: use of a lawyer for the child, a court appointed psychologist and so on.
Such a quick return date on the divorce papers seems to indicate that the mom is filing an emergent application with the court to give the impression that there is an actual emergency where the child's health is in imminent danger.
While I cannot represent you through an internet portal, I would advise you to get an attorney who is versed in expert witness management and trial presentation. CAPTA causes the court to weigh too heavily in favor of its own appointed personnel and you will have to have a lawyer who can out maneuver this collection of professionals.
CAPTA is a federal statute that preempts state law in child protection. Be very careful because the stakes in your case are huge. DO not go it alone!