My son, 12, has had a cbc, ultrasound , CT scan , X-Ray, and an allergy test and everything checks out okay. He is having a hard time breathing and soreness from his belly button to his solar plexus . This has been going on for over a month. He s been prescribed prednisone and prilosec, but nothing seems to be working. He doesn t have a problem eating and says that a cool drink eases the pain. He s a very active kid, please help.