Sometimes if u r not used heavy exertion it will cause severe body ache in some
Just check if u have any symptoms of sore throat cold or cough flu like symptoms
And also check if u have gastric problems like indigestion or acidity
If there are no such symptoms
Get ur vitb12 and d3 check cbc and iron studies done to check for any deficiencies
Next Steps
Take rest and get the tests done
Health Tips
You can online consult for treatment