Final answer:
Dwight is likely experiencing stress and anxiety due to personal and school pressures, alongside his responsibilities and lack of resources like a computer and printer.
Step-by-step explanation:
Dwight is most likely feeling the effects of stress and anxiety, which are common emotional responses to difficult personal situations, such as family conflict, and to pressures from the school environment. Symptoms like a pressure in the head and tightness in the chest are common physical manifestations of these emotional states. The additional responsibilities and challenges Dwight faces, like working late hours and lacking essential resources such as a computer and printer, contribute to his emotional distress, compounding the difficulty of managing his academic workload with his personal life.