Im 54 years old, in fairly good health normally, dont smoke, never have. Yesterday morning woke up wtih a cough and flu symptoms.  Got worse through the day, developed pain and tightness in upper respiratory, dizziness and feeling that Im not getting much O2 when breathing.  Cough this morning is very frequent, dry, what little I can cough out is thick and yellow.  trying to decide if I should wait this out or see the doc.  I had pneumonia once, many years ago, but it developed over several weeks.  This hit me very quickly over 24 hours.
Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you should definitely consult doctor and rule out pneumonia and bronchitis. Both these can seen suddenly especially after the age of 50 years with similar symptoms. So get done clinical examination of respiratory system, chest x-ray and PFT (Pulmonary Function Test). You may need antibiotics, inhaled bronchodilators (formoterol or albuterol) and other supportive Chat Doctor. Do warm water gargles 5-6 times a day.Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.