There are many reasons for throat pain and since your problem is since last two months the most probable reason could be an acid reflex. If you are a teacher by profession or talk a lot there is a probability of your throat getting hurt by evening. If you have a nose block and are a mouth breather by night the throat also will get dry by the night and daytime by talking or acid reflex your throat pain will worsen. So get yourself properly evaluated by an ENT surgeon in person.