My son is 3 he fell off the bed hit the knob perfectly on our dresser and you can see and fell the indention from the knob. He is a bit tired and cranky. No vomitting, blood or anything but he did cry and now is very clingy and saying his head hurts. Should I take him to get looked at or just wake him up in a hour or so to see how he is acting. He is very sleepy, keeps falling asleep wherever he is (standing, sitting, and then falls over) Please help!