I am a teacher and have had several of my students to become sick with the flu, pnuemonia and strep throat within the past two weeks. I have been feeling lousey with a sore throat, cough, runny nose headache for about a week and a half. Today I woke up with a gurgling sound in my chest, chest pain and my sore throat has gotten worse. I am coughing up green and yellow mucous. I also saw a little blood. I have no appetite and am very nauseous It is difficult for me to drink or eat. Should I go to the emergency room?