Are you running fever, or have chills real bad, aching back exspecailly lower back, legs hurt like muscle growing pains, sour throat coughing snezzing, feeling like you been hit by truck, those are symtoms of flue. You can also have stomach flue,which is vomting. But you can go ahead and test but if your to early you might wait untill you are real close to your next period to take a preg test, good luck to you, and merry christmas.