Sally, a 17-year-old female, is brought into the ER by her family who worry about her increasingly destructive behavior. Although Sally reports that she “never felt better,” as a psychiatrist, you notice that she is speaking rapidly, switches topics quickly, and is very difficult to interrupt. She reports needing very little sleep and denies the presence of hallucinations and delusions. After interviewing her parents, you learn that Sally acknowledged that she recently bought thousands of dollars of clothing online. Her parents are perplexed, as Sally was previously doing well in life. As a psychiatrist, you are most likely to hypothesize which of the following?