Fever is one of the symptoms you have to be aware of but having fever doesn't mean corona ulimately.
Sudden headaches are also the symptoms of the covid.
One of the major symptom is sore throat. Continous sore throat might point to covid.
Wash your hands in regular interval as well as after and before leaving house.
Keep social distancing and wear marks most of the time when outside or near someone who is suffering from covid
Be at home and only go oustide on absoulte need with all the gears you need like masks, sanitizers,etc