What Causes Pain In Front Of The Head?

I banged the back/top of my head on my desk at work yesterday. i've had a headache most of today but only in the front of my head near my sinuses. I'm getting over a cold, so I wasn't sure if it was a sinus headache or injury related.I also slept in a little later than usual today. No other symptoms. Did I have a minor concussion? If so- is it ok for me to go on a short flight tomorrow? (DC to Atlanta)