My son fell off a bed that is about 4 ft high he is 9 months. Few days later ei saw blood in his crib and I took him in to the hospital. They checkedhim and said the blood was a mystrey because they didnt see trace of blood in his nose. He doesnt have any cuts or scrapes or bruising. But im worried he might have a hematoma or broken nose? How might I know should I bre worried if they dont look intrrnaly?