Hi welcome to the health care magic Pharyngitis can lead constitutional symptom like muscle pain.. So if clinically pharyngitis present after examination than antibiotic course like Amoxiclav can be given If ribs are tender to touch than costochondritis might be causative and for that brufen like anti-inflammatory drug given... Hot compress also useful Avoid stress Avoid strenuous work and take rest As your other reports normal no need for much worry Consult physician for examination with keeping all this in mind Take care