It seems you are suffering from viral infection first of all proper diagnosis is must till than you can take homeopathic med Eupatorium perf 30 and Bellladonna30 alternatively twice a day
Next Steps
Go for CBC , dengue test
Health Tips
Take plenty of water , veg soup and fruit and easily digestible food like Dalia or khichadi for high fever you can take paracetamol no other medicine consult again with test reports