https://www.healthline.com/health/can-stress-make-you-sick
Fever
Chronic stress and exposure to emotional events can cause a psychogenic fever. This means the fever is caused by psychological factors instead of a virus or other type of inflammatory cause. In some people, chronic stress causes a persistent low-grade fever between 99 and 100˚F (37 to 38°C). Other people experience a spike in body temperature that can reach as high as 106˚F (41°C) when they’re exposed to an emotional event.
Psychogenic fever can happen to anyone under stress, but it most commonly affects young women.