Hello, I have had a sore throat for three weeks now. I had a zpac at home, so trying to avoid a trip to the doctor, I went ahead and took it to try to rid myself of illness. After I finished the zpac my sore throat continued and I went to my primary care physician. I was cultured for strep and it came back negative. A week later my throat is as sore as ever along witih body aches, fatigue, and headache. I went back to my PCP who prescribed another zpac after I told her the first one did not work. My throat has prominent red and purple veins on it and the lymph nodes on the left side seem to be swollen. I have had no fever. Any ideas as to what this could be?