It is always important to take head injuries seriously, even if there are no immediate symptoms like confusion, vomiting, or loss of consciousness. If you are experiencing headaches and muscle spasms after hitting your head, it may be a good idea to speak with a doctor. They can assess your symptoms and determine if any further tests or exams are needed to ensure your well-being. It's better to be safe and seek medical advice rather than risk any potential complications from a head injury.