I have been taking phenoxymethyl penicillin potassium since Friday late afternoon for what my doctor diagnosed over the phone as tonsilitis.. Due to the fact that I had been getting flu like symptoms in the body on and off for six weeks with no other symptoms.. apart from this current episode where I now have a sore throat and appearance of yellow pus on a swollen left tonsil.. My sore throat has become excruciating and worsened since Friday, This morning I looked with a torch at my throat and there are white streaks and patches on the actual back of the throat not the tonsils, though they are swollen and red with a couple of yellow dots, is this normal ie symptoms of strep throat or thrush caused by the body's reaction to antibiotics?