I got cold and cough (non covid) on 23 Nov which got well in 20-30 days, Post that, I feel like there's something in my upper throat , I need to clear my throat everytime. But there's no pain at all. But sometimes I feel my heart beat becomes fast. I feel little weak too. I'm taking Vit D3 syrup a day every month due to insufficient Vit D. There's no breathing issue or chest pain. I also got covid three months back(only fever, no other symptoms). I got well in a week. What could be the issue? Who I need to visit? ENT or Pulmonologist?