You feel awful. Your head is stuffy, you have a sore throat and you are shivering. Is it a cold or the flu? Should you take cold meds and power through or call in sick and go to bed? Peter Hibberd, M.D. told NewsMaxHealth.com that the best way to distinguish between a cold and the flu is by a rapid test your doctor can give in the office. However, clinical symptoms can help you figure it out before you call your physician. If it’s a cold… you’ll likely have nasal congestion, a minor sore throat, a dry cough and possibly a low-grade fever. The common cold typically comes and goes in about six days, and few of us suffer any complications. When you get a cold, you can usually go to work as this is a mild illness. If it’s the flu… you will experience a sudden onset of all-over body aches, a fever over 100 degrees Fahrenheit, cough, congestion, nausea, weakness, loss of appetite and even vomiting. Influenza is a serious illness — so serious that it is difficult to go to work because you are too ill and too weak.