Vomiting, severe burning in stomach. and belching constantly. can't keep nothing down if not gall bladder. why else can it be.

Vomiting: There are many things that can cause the symptoms you mention. These symptoms are serious, and persistent vomiting may lead to dehydration and electrolyte (blood chemistry) changes. Other things to consider are stomach (gastric) or peptic ulcers, gastric growths, pancreatic problems, severe reflux disease (heartburn) or other intestinal problems such as bowel obstruction. You need to seek care.