Fever, whole body pain? Sort of feeling sick all over, instead of a headcold or chest cold or stomach bug?

If there's a chance this could be The Real Influenza (instead of the half-a-dozen other viruses that sometimes get called "flu"), and if you can deal with Western Industrialized Medicine, you may want to call your doctor sooner rather than later. There's treatment out now to make influenza last less long, but you need to start taking it within the first 48 hours from symptom onset for it to work.

Plus rest, fluids, juju.