For the past couple of weeks, I can't seem to clear my throat. I keep clearing it throughout the day, but I never seem to get anything up or down. When I look in there, the back of my mouth (top part of the throat) has white on it. I thought my tonsils were swollen, and the tonsil on the left side had an oval whitish spot on it. I went to the doctor and he said I had a build up of pus in my throat, and my tonsils didn't look bad. He put me on antibiotics, thinking it was strep or possibly mono. The strep test and mono spot came back negative, and nothing has grown on the culture they used from the strep test. It still feels like I can't get my throat clear, and it's making me insane.