Hi, don't worry .....this must be a normal allergic cough which will not go easily....should be treated properly......COVID 19 has symptoms like dry cough , sore throat, fever , diarrhoea , breathing difficulty, if your symptoms are worsening like having difficulty in breathing .....you can take COVID test....or otherwise you don't need it......because some people has very mild symptoms of COVID and some will not even have symptoms at all....but they will get affected.....so wait for next 3 days since it is already 4 days .......
Next Steps
wait and self quarantine yourself from your family members for another 3 days
Health Tips
easily digestible food
plenty of rest
and get tested for COVID 19 if symptom persists or worsens