I woke up today with a bad headache so i took excedrin. while at work i started feeling worse, really lightheaded and nauseous all day. i took pepto and didn't work. my headache is gone, still kinda queasy. hx of syncope. i just want to feel better?

Likely Migraine : Sounds like migrane headache but tou should be seen promptly by your MD.

Migraine?: Sounds like a migraine. Have you had headaches like this before? Migraines are very severe, and are accompanied by nausea as well as an aversion to light and sounds. This episode will pass in short order, but these headaches are episodic so you will likely get another at some point. You may need some diagnostic testing and certainly need some treatment options.