My head hurts and aches a week after hitting it on a ceiling. i didnt lose consciousness, vomit and thats the only symptom i have. should i be worried?

Unless getting worse: As long as the pain is progressively getting better then there is no reason for excessive concern. You may have bruised the skull when you hit your head. There is probably inflammation of the tissue between your skull and skin that from the injury. There is little room for swelling in the layer and therefore it can cause more pain. If its getting worse, you should be evaluated. Try ice pack