Thanks for posting your query.
Do you have fever/ cough
with sputum/ breathlessness along with chest pain?
You should consult with internal medicine specialist/ pulmonary physician and should go for thorough check up.
You should go for chest x ray
and ECG on preliminary basis.
If all mentioned symptoms are present along with significant chest x ray then there is possibility of pneumonia
and you should take complete antibiotics course.
If all mentioned symptoms are absent then there is high possibility of myalgia
You should take muscle relaxants along with analgesics.
Dr. Mayank Bhargava