The common cold (and boy is it common) develops gradually over several days and can start with a scratchy throat, sneezing and sniffles leading to congestion. Any fever present is mild (in adults). Coughing is generally hacking and can be moist due to congestion.
On the other hand, influenza often starts rather suddenly with fever (usually greater than 101 degrees F and lasting 3-4 days), headache and all over body aches (myalgia). People with the flu are often exhausted or fatigued. Coughing is usually dry and hacking and can last days or weeks after all other flu symptoms have passed.

Influenza is caused by a virus. In general, viral illnesses will run their course without a trip to the doctor. Antibiotics don't work against viruses, so all your doctor can recommend to help you are pain medications, cough suppressants or an anti-pyretic (fever reducers). All of these are available without a prescription from your local drug store to help you deal with flu symptoms.
If you are suffering from cold or flu symptoms, you should also schedule a visit to your chiropractor. Chiropractic care doesn’t treat the virus directly, but rather boosts your body’s ability to fight the invaders. That’s why regular chiropractic care can reduce the frequency with which you get sick. When your body’s immune system is in peak condition, it can fight off minor intruders with ease.