A 31-yeаr-оld wоmаn with repоrted history of mаjor depressive disorder and attention-deficit/hyperactivity disorder presents as a new patient. She is currently 10 weeks pregnant by last menstrual period and confides in you that she has been using intravenous heroin daily for 2 years. She has been going to Narcotics Anonymous meetings intermittently, says she asked someone to be her sponsor, and has been “trying to give it my all.” She says she last used heroin 2 days ago and says she “really wants to stay off the stuff for the baby” but feels “the worst I have ever felt in my life.” She endorses diarrhea, irritability, and achiness. On physical exam, she is noted to be flushed, she frequently shifts in her seat, she is yawning frequently, and she uses several tissues to blow her nose. What of the following is the most appropriate next step in management?