We've all had our Bell Rung. My fear is that some (me too) have not gotten a proper evaluation after thunking head to head.
But a proper evaluation, one that measures cognitive impairment, is available.
With or without health insurance, you should go to the ER with ANY head injury. We have universal healthcare in the US. No medical facility in America will deny you treatment. So, if you're not a client of RuckingInsurance.com (making you a dumbass), get checked out anyway. Then, call BMK, so he can walk you thru the Lock-Tall pile of paperwork.
Let's ring in the New Year, instead of having ringing in our ear's.