Presence of a queue at a doctors office should not be the reason that you should avoid taking treatment for your problem. Going only by the verbal description that you have mentioned and without any look at the clinical picture, it seems that you immediately need a proper clinical examination for proper diagnosis of the condition. History of tobacco usage is a risk factor for oral cancer development. A biopsy and histopathological examination will be required to accurately diagnose the case. The right treatment can be instituted only after the right diagnosis. Alternatively you can post clinical photograph on Practo for an online consultation with a specialist. Regards.