I have studied your case.
suggests possibility of viral illness.
Another possibility of systemic bacterial infection
You may need to investigate in form of complete blood count
You may need clinical examination also to confirm diagnosis.
Till time you can start medication and antibiotic consulting your treating doctor.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.