When self medication doesn't work

I will try to take lozenges, non drowsy flu tablets, and this Nin Jom cold remedy when I have slight sore throat and runny nose. However the past week, the symptoms just refused to disappear. I decided to try Dr Qi at Eu Yan Sang Clinic at Tiong Bahru Plaza. I heard from a friend and read online too that she is good at curing cough. She prescribed a week of herbs/ medicine to reduce my heatiness etc. After 2 days, I feel better.