I developed a painful throat on swallowing over a week ago, a white ulcer (not a white spot, an ulcer a.k.a canker sore) on my tonsil, about the size of my baby
finger nail. I went to the doctor and he said I had tonsilitis and gave me a 7 day prescription for clarythromycin. I have finished these. My canker sore did not get smalller, it got much larger (larger than my thumb nail now) and changes colour every day, from green with red spots to white and brown.