I have had recent weight loss fatigue and extreme vomiting on and off for the past 6 months.  I have been seen in the ER several times with no diagnosis blood tests and x-rays result in no diagnosis other than it must be the flu. I have had my gal bladder remove a year ago and the symptoms are similar to the gal bladder attacks i have had in the past. When i vomit it looks like slime no blood and the stomach pain is severe, no lose stools.  This happens about every three weeks and lasts about a week the symptoms clear up but i still feel nauseous until the vomiting begins again. I can eat very little at any given time and am tired all the time.
Your description of the condition points to a diagnosis of Gastric malignancy or severe peptic ulcer disease or its complication, though it's not confirmatory unless test results comes. If I was your treating physician/Surgeon I would suggest you to hepper G I EndoscopyFecal occult blood test USG abdomen other routine investigations. Instead of visiting ER I would suggest you to visit a gastroenterologist on a OLD basis which can solve your issue. Hope you find my information useful. Any further questions are appreciated. Thanking you Chat Doctor.