Glad you walked (rode) away!
But Dude, do yourself a favor and go to the hospital and have that head looked at. If you're O.K. then great, but if you've got internal injury it's better to treat it sooner rather than later.
-All the Best to you.
An experienced riding buddy advised me that noise goes with the territory when you want good ventilation. Our 110F+ degree summer days make ventilation top priority for me. I've worked in and around loud machines my whole life, so I'm probably less sensitive to noise than most people.