Overthinking and anxiety can manifest itself as several physical symptoms. Given the age of the patient, it is recommended that you first consult a general physician to see if all is well on the physical front. Blood work and physical investigations—especially
thyroid levels and
Vitamin D levels should be checked.
After that, I would advise you to schedule an appointment with a psychologist to explore the various reasons behind the overthinking and her physical condition.
Next Steps
1. Consult a general physician to run some blood work.
2. Consult a psychologist to explore emotional issues.