I've been smoking 1-2 cigs a day for the past 1-2 months. Sometimes I don't smoke properly and end up inhaling too much smoke and coughing, resulting in a burning sensation. Last Thursday I started feeling an itching sensation and pain in my back right throat. When I saw it using my phone flash light I saw a black/white growth. This is the current state after 3-4 days. What could this be? What are the chances of this being cancerous and when should it heal ideally in case it isn't cancer?