I had a fever (100.7 F) yesterday with chills and feeling achy, but no fever/chills or feeling achy today. Decreased appetite, nausea, and one episode of vomiting yesterday. I also woke up yesterday with a rash on my front and back torso, upper arms, and upper thighs. I haven t eaten anything or taken any different meds than my usual, so doubtful I m experiencing an allergic reaction. Is this most likely a virus? Do I just treat the symptoms?