Thanks for posting your query.
Does she have fever/ difficulty in respiration/ cough
along with sputum?
With the available described symptoms, there appears to be high possibility of muscle ache.
You should consult with internal medicine specialist and should go for thorough chest examinations.
She should also go for chest x ray
on preliminary basis.
Chest x ray will reveal the cause of chest pain; whether pleural and pulmonary pathology is present or not.
She should take analgesic
along with muscle relaxants.
She should take proper bed rest
You should go for ER for urgent check up.
Dr. Mayank Bhargava