Feeling bleh today...

I've got a headache, my throat is sore, I can't hear off one ear and my muscles are sore. Could this be the onset of a flu, or simply a case of overtraining?

I don't want to risk missing the Subic race next weekend. Dare I run an easy 4 miler tonight?

UPDATE: I did run tonight, 5.35 miles. It was supposed to be an easy run, but I exerted more effort than planned. Bad, I know... Per Lance Armstrong through my iPod, I recorded my best 5K yet at 28'18". I felt woozy after the run ~ shouldn't have pushed myself too much...