hI!
Sounds like an infection.Maybe your tonsils are purulent.(with pus)and the moment the MD saw you it was not visible from his angle of view but maybe you notice some bad odor or kind of "musky"odor.This could be a symptom of infection.You don't have to be feverish to have tonsilitis.What i do when that happens is mix equal parts of hydrogen peroxide and water and do gargles,then wash my mouth to protect the teeth.Maybe and only maybe, the uvula is irritated because you are not breathing normally and your throat is dry.But check again with your MD and tell him(her) that you do see the white spots and you are really preocupied. Insist. PS:I do the gargles at least two times a day. Morning and night and i try to be careful with food .Sodas,sugar and flour are very atractive to bacteria. But food in general get stuck in the tonsils and putrified and bacteria grows happy there.