Hello,
It is very difficult to make a diagnosis without examination but the possibilities for your symptoms are mucocele,tonsillitis and pharyngitis.Canker sores are small shallow ulcers that appear in the mouth and often make eating and talking uncomfortable. They are generally caused by Stress, tissue injury, eating certain foods,impaired immune system, vitamin B-12, zinc, folic acid, or iron deficiency; and gastrointestinal tract disease, such as Celiac disease and Crohn's disease.