If an actual doctor cleared you for full activity the best thing you can do is ice it to keep the swelling down and eventually it will go away. If you have a persistent headache, any dizziness or vomiting you need to be checked again, maybe by a different doctor. I am sure it is just a bump on the head but be aware of how you are feeling for the next 24-48 hours. If you can take a break for at least 24 hours and just ice it and rest, I would definitely do that.
This is not medical advice, just mom advice!