Suggest Remedy For Constant Headache After Head Injury

My ten year old daughter hit the back of her head on the trampoline side rail five days ago. Went to the doctor the next day and she said it is simple head trauma and that we should just have her rest for the next week or two. We are now 5 days in and her headaches persists. Our doctor insists that we need to be patient and just continue to rest. What is your take on how we should proceed?