A 28-yeаr-оld wоmаn is аdmitted with sepsis. Her cоndition responds to antibiotics but then nearing the end of the course of her treatment, she seems to spike a fever again and requires further antibiotics. The patient tells her team that she is very depressed, and they order a psychiatric consultation. The PMHNP evaluates the patient in the semiprivate room and upon leaving the roommate passes a note to the PMHNP, informing her that she observed the patient roommate injecting her IV with tap water. What is the most likely diagnosis?