Sore throat, mild headache, no fever, generally feel unwell for last 3 days. no sinus or other cold symptoms. continue to treat at home?

Doctor can examine: Throat pain can be from strep throat infection (antibiotics are needed), a cold or influenza (antibiotics usually not used), or from some other cause such as allergies. Usually, a person sees a doctor if the sore throat illness is bothersome, coming with other symptoms (head pain in this case), is recurrent, or doesn't go away quickly (as in this case).