Your nausea may have little to do with the GI tract & therefore may not respond to vomiting.
Biliary & pancreatic disease may be present. Gas/bloat syndrome? Consider "central" causes like: motion sickness, vertigo, migraineheadache, brain problems (some very serious). Also, rule out infection (? Urinary tract), food poisoning, medication side effects, pregnancy, & even stress. See your doctor.
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