And it's most likely your sinuses since you've had a lot of trouble with them before. Add some decongestant to that acetominophen. Your sinuses aren't one continuous space - they're compartmentalized. This means that you could quite easily have one side inflamed and irritated, but not the other. If the pain doesn't recede with over-the-counter meds by about 2-3 days, you're talking a migraine or sinusitis more than likely. Then you'll need a doctor, insurance or not.