My son who is now 16, feels nauseous every day and has for years. Have gone to doctors, naturpaths, had an upper endoscopic procedure and biopsy, modified diet, nothing is showing up. Once was diagnosed with GERD, don t think he has that now, gastroparisis, does not really have that either. He used to vomit all the time when he was quite small but has not vomited since he was about 5 or so. Still feels sick every day. Any suggestions on where to go from here?