Your symptoms remind me of an episode on Mystery Diagnosis, (the T.V. show). A girl had uncontrolled vomiting and was very sick and of course the Doctors could not find anything wrong with her. She literally thought she was dying. If I remember correctly, she was ultimately diagnosed with a very rare but constricted bile duct, re; gall bladder. I hope I am remembering correctly. You might try doing a search re: vomiting and Mystery Diagnosis to get the episode number. If there is nothing wrong structurally, then it sounds like a fungal infection in your gut. The heartburn you experience is a very fungally related symptom. Try taking Natren's Probiotic chewable wafers, call Natren they will know what you need, sorry can't remember the varietal. The wafers are specifically for conditions like heartburn. There are numerous testimonies on the web for healing heartburn with Probiotics.