I have a son who has cyclic vomiting syndrome....also known as abdominal migraines. He had most of his episodes when he was younger, he is 10 now. It took months to figure out what was wrong with him. I found it on the internet and brought it to the attention of the doctors. We put him on propranolol and prilosec and he did great. It does take a lot of persistence, but you will figure it out. You can look up cyclic vomiting syndrome on a search engine and it should take you to the website for it. Read through some of the message boards, information and such. I hope this helps somewhat. Good luck!