I have a nine year old that has have pain around his belly button for the last 2 weeks. all ready took him to our doctor twice and his stomach still hurts.

If : If the pain is still present and your doctor has not given you a concrete diagnosis or prescribed an effective treatment, then you need to take your son in again for a further evaluation, or seek a second opinion. If not done already, he likely needs blood and urine tests and an abdominal ultrasound. If the pain worsens or he has a fever take him to the urgent care or er. I hope he is better soon.