my 5 year old ds somersaulted off the bunk bed and banged his head this morning, i didn't actually see it happen, ds1 told me. He was very shaken up, crying for ages and at one point wouldn't open his eyes. He perked up for a while, ate his dinner and was playing but for the last 1/2 hour complaining his head hurts. he's not crying but wants to watch tele (thats unusual). Should i take him to A&E or see if he gets worse?