What do you suggest if I hit my head really hard and I'm worried. Please help!?

Watch for symptoms. Do you black out? are you having problems naming things ? has your speech changed? Do you have numbness , tingling or weakness in an arm or leg, any change in vision? Any nausea or vomiting? unexplained sleepiness? If you answered yes to any of these questions, you should see a doctor now. If not, you can use ice on the bump and watch.