I have flu, i cough a lot and it a bit painful when i do, my nose is also blocked, must i go and see a doctor?

Flu : If you have lightheadedness, dark urine, shortness of breath, constant chest pain (not changing with a cough); or; if you have chronic health problems like HIV, diabetes, cancer, kidney disease then its times to see a doctor. Most of the time young healthy people recover from the flu by eating well, drinking extra water, and rest (but not staying in bed all day). The flu is worst on days 2 and 3