Hello. My 9 years old has severe sore throat for 3days with very foamy saliva, swollen lymphs on both sides of the neck, no fever, no coughing, only throat pain and weird voice as if due to sinus, but she has no actual nose congestion. She also has been snoring when sleeping. Can it be due to airway obstruction in her throat, b/c her throat seems swollen alot? Thank you!!!