I got something in late-November, early-December, that lasted a good two weeks. I didn't take anything for it, just let my body handle it. Not sure if it was the flu or not. I still have a slight cough from it, but nowhere near as bad as it was.
Talked to a doctor...Thinks it's gastroenteritis. Symptoms can last up to two weeks. He said to come in if I have fever, chills, dizzy and the vomiting and runs are continuing. Otherwise let it run its course or make an appointment if it's not much better in a week. I'm starting to feel better. Just slower than I expected.