The pain might be likely due to the trauma, but kindly watch out for these danger signs, if at any point you develop any of these symptoms you should go to the ER at the earliest. Loss of consciousness, multiple episodes of vomitting, confusion ad dazed feeling, nausea, slurring of speech, loss of balance, loss of sleep, blurring of vision, loss of memory and excessive sleep. So if you don't develop any of these symptoms it's normal but if you do develop these symptoms visit the ER at the earliest.