J.C.
Hi C.,
If the docs thought your son had anything seriously wrong they would not wait a couple of weeks for a CT scan. They would act immediately from my experiences. I know how terrifying this must be for you and I would advise you to call back your doctor with a list of questions. Hopefully they can put your mind somewhat at ease. I know you can not even think when you are originally hearing the news.
God Bless you and your son.