Do I need to go to the doctor and will I be given something that helps? I started having sore throat a week ago, and it has gradually been getting worse and from three days ago I have been coughing up green yellow phlegm and having lots of painful chesty cough now. On top of that my asthma is back for some reason (I only get asthma with allergies - cat, horses, pollen) and it's making my life a misery. I have very painful tight chest constantly and it's also very difficult for me to sleep although I'm incredibly tired.