Had A Draft In My Bedroom Whislt Sleeping, Developed A

Had a draft in my bedroom Whislt sleeping, developed a deep cough. Persisted for 4 weeks, started wheezing and had asthma attack. Doctor told me I had bronchitis. Bringing up thick clear-greyish foamy phlegm, sometimes yellow. Went to A&E had another asthma attack. Stomach pains from all the coughing. I'm constantly burping and I feel something is stuck at the back of my throat. I need help! I keep having coughing fits then throwing up!