I had an infection 4-5 weeks back and i was given cefpodem 200 for 5 days. That time this spot was not there. Then after a week i drank cold stuff by mistake and again cough started, ent gave me same again for 5 days. In the second time of infection i saw this white spot under my left tonsil which wss not there before. And after completion of the course also it's there. Now it's been 1 week since i have completed the course, i still have cough not much but its there. Most of the time dry and sometimes with phlegm. Phlegm is clear in appearance but i have snot from sinus coming as thick white sometimes. I am doing salt water gargling 3 times a day. Please guide me.