Thanks for your query.
According to what you have said, you are having Diabetes
and Coronary artery disease, all of which are under treatment.
The symptoms of sore throat
, fever, body ache
and flu can be due to infections from bacteria or virus. To determine that, you will need to undergo some laboratory investigations and physical examination. Once it is identified, proper medications can be given. I would suggest you to visit your general practitioner for an evaluation.
In the meantime, you should have plenty of fluids to prevent dehydration
. You could also use some tepid sponging when your fever is rising.
Hope I have answered your query. Please let me know if I could be of further assistance to you. Thank you.