A cаregiver brings her 7-yeаr-оld sоn tо the pediаtrician's office, concerned about the child's bedwetting after being completely toilet trained even at night for over 2 years. The caregiver further reports that the child has wet the bed every night since returning home from a 1-week fishing trip. The child refuses to talk about the bedwetting. The nurse notes the child is shy, skittish, and will not make eye contact. Further evaluation needs to be done to rule out what possible explanation for the bedwetting?