My 13 yr old daughter has been sick for 8 days... sore throat , headache , occasional nausea , fever (100-101.5 avg). sore in her mouth and throat, restlessness, fatigue . Now she developed a strange rash on ONLY her arms & legs. These spots start as a small red mark-like a bug bite-but then progress to a quarter-size red, bumpy itchy/burning spots that come and go. What can this be?