Last week I noticed that suddenly my left tonsil of white patches of what looks to be pus. The tonsil was swollen, but nothing on the other side. As the week went on the lymph node on my neck on that side swelled up too, it's tender to touch and feels like it's able to move. A week later and my left tonsil is almost completely white and the lymph node is still the same but not as painful. I went to the doctor and she said I was negative for strep, but gave me antibiotics anyways. They don't seem to be helping. I looked up what this could be and someone told me cancer since it's only on one side, it hasn't moved over to the other side. Please help.

I'm just so worried, and don't know what to do. Could this be cancer?