You're "woozy" and have unspecified pain in your head and you're....at work? Please call your doctor right now and say you're coming in immediately and if he can't see you, then go to an "urgent care center" directly from work, now (though I would still recommend seeing your regular doctor ASAP even if you get checked out at an urgent care center).
You shouldn't be at work, and if you're woozy, which I take to mean dizzy or weak or both, you shouldn't be driving either -- get someone to take you even if you have to leave your car and get it picked up later. Stay home tomorrow no matter what.
You may have ANYthing. You should get diagnosed. Even if it's just the nasty but common norovirus that is going around all over the place, you are probably still contagious to others -- with some gastro viruses, you remain infectious from three days to up to two weeks after you feel better and stop vomiting/diarrhea.
Please update us. I hope you get a diagnosis and treatment quickly and please-- do not drive!