Suggest Remedy For Persistent Severe Abdominal Pains

my son has been having severe abdominal pain for about two years. This is usually followed by vomiting and sometimes diarea for days- months when he eats. last year he had a c-scan for unrelated reasons.The scan revealed 3 nodes or noduels I can t remember which they called them in his lungs 10mm 9mm & 8mm . Two outside his lungs and several in his abdomonal lymph nodes. All the Drs say due to his age 19 years old probably nothing to worry about. now he is 20 had a scan 2 weeks ago best they can tell no change. He has been to hospital twice in 2 weeks to get nothing done. He is there now in so much pain. His whole body trembles and he is in tears. Last Dr said could be something like Chrons. Help me. He has12k in dr bills to find out nothing