Thanks for posting your query.
Do you have fever/ cough/ breathlessness along with pain?
You should consult with internal medicine specialist and should go for thorough check up.
you should go for chest x ray
on preliminary basis.
If all these symptoms are present then there is possibility of pneumonia; you have to take complete antibiotic course along with muscle relaxants and analgesics.
If all these symptoms are absent, then there is chances of muscle relaxants.
You should take complete antibiotic course.
Dr. Mayank Bhargava