My husband had a fall at the hospital on Tuesday. He was admitted to the ER for X-rays and a head scan. He received 11 or so stitches for a cut on the forehead. He rested Wednesday but felt better on Thursday and got up and showered and dressed. He still had pain but it was a little better. However yesterday he felt really bad with more pain. During the night he had some nausea and a bad nosebleed. He is 81.Could he have a concussion?