Last week while vacationing in Thailand I developed a throat infection. It came on one night with a high fever that didn't persist after, but left a terrible lasting pain, swelling, and white spots on one side of my throat. I started a course of antibiotics--amoxicillin 500mg 3 times a day--and right away within 2 days my throat was back to normal. I continued antibiotics for a total of 9 days, during which time I felt no symptoms of infection. Now, 24-48 hours after taking my last pill, I've developed another fever. It doesn't feel as high as before, though I don't have a thermometer to confirm. I am feeling no other symptoms. What could this be? Is it likely related to my throat infection? What should I do?