My 4 year old girl has a raised rash on her face, back, neck, stomach, on her bottom, and in her underwear area. Today is the 3rd day for the rash. She has a sore throat, coughing, and I found 4 lumps in her nape area in her hairline. The largest being behind her left ear in bottom hairline? What is causing the lumps? Are there lymph nodes there?