I had a cold and cough,After 2 weeks,and coughing so hard it made me sick,i went to my local Hospital to get it checked out as it was the weekend,I was then taken by Ambulance to another hospital where i was put on oxygen,and was told i had Pneumonia,I was in hospital for 6 days and had to have 6 weeks off work,Apparently if i had gone to my doctors after a week,they would have diagnosed it and give me Antibiotics which would have cleared it up in 7-10 days