I had a clustre headache once. No idea why, and I barely remember it apart from going under the covers, screaming, running around under covers like a madman and denting the wall from headbutting it in an attempt to avoid the pain. Not fun. Well, it was probably just and extremely bad migraine, since cluster headaches seem to be chronic.
But yeah, take an Aspirin. They usually work, and don't really present any health risks, unless you decide to take the entire box in one sitting. Also, go to sleep. I wouldn't recommend you do anything else on the computer, since eye strain really won't help your headaches at all. Sleep is the best.
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