Hi, I am 20 years old, and about a month ago I went to the doctor because my throat was killing me and my tonsils were swollen, blood red with white patches on them. They took tests but all came back negative. I was given antibiotics which took awhile to work but they did work. After 3 weeks the sore throat, swollen tonsils, red blisters, and white patches came back. Once again I was given antibiotics. My throat no longer hurts but my tonsils are still really swollen. What could be the problem?