What Causes Persistent Vomiting And Being Diagnosed With SMA Syndrome?

Hi my daughter is 17 and been throwing up for about 9 months. She was diagnosed with SMA Syndrome then thy changed it to Lower loose Esphogeal Sphinter. We have had Hida Scan, EDG, ct scan, Eaphogeal Motility study, and everything came back fine. She is still throwing up everytime she eats. What should I do or look for?