My daughter was hit on the back of the head with a volleyball 4 days ago. No symptoms at the time. Then the next day, she began to have headache, blurred vision, and dizziness. Took her for a CT and it was normal. She has been resting since. Today, she spit up blood twice, and just had some diahrrhea, nauseated. Is this normal for what she s been through or should I seek medical care?