Recording to your sign and symptom you are suffering from acute upper respiratory tract infection so you should take consultation for better diagnosis and best treatment.
Erythromycin is antibiotic and
You can take with crocin cause it's act as antipyretic.
Next Steps
best treatment depend on best diagnosis so you should take consultation.
Health Tips
you should follow good life style like taking sufficient amount of drinking water and take warm soup and do yoga and meditation for increase to strength and immunity.