My friend has the following symptons
Sore throat suggests infection. Hot n cold flushes and blurring, nausea, vomiting etc. suggest it may be malaria also. Your doctor is right in giving prima facie medicine. But it would be prudent to take blood samples for Malarial parasites, TLC DLC etc. M.P. if (-)ve once, doesn't mean that malaria is absent. Presence calls for radical treatment. Main thing is manage fever, headache, vomiting etc. first. To my own such patients, I suggest Superman fan vat, Panjiva, god anti and Gilroy mixed in one which prevents and cures all above symptoms and are harmless, safe herbal medicines. But slow...but.non-toxic too. For more throat Toilet lozenges. Hope it helps you.