Im happy to see you have quit using all tobacco. Many do not realize the dangers of chewing tobacco. Tobacco is loaded with all kinds of chemicals. I hope you do not return to using it.

An ENT is an Ear, Nose and Throat specialist. Some of them treat mainly children with tubes in their ears while others specialize in oral cancer. An oral surgeon usually sticks to doing wisdom teeth, biopsies, and other mouth surgeries. Dentists are not always proficient in diagnosing mouth sores as their focus is the teeth. A family doctor usually does not deal with oral issues as they usually treat anything from back pain to the flu. For your situation I would look for an ENT who is experienced in oral cancer. Im not saying thats what it is, a person could have all kinds of different problems going on in their mouth. Any sore that has been there for over 2 weeks should be checked by a professional. An oral cancer specilized ENT should have better knowledge about all the possible issues a patient would experience in their mouth/throat.

Good luck!