I am havin constant acid reflux pain. i've had a barium swallow done that was negative. do i need to have an endoscopy?

Yes. Reasons below:: • dyspepsia associated with alarm symptoms at any age. • new onset dyspepsia in a patient ≥50. • dysphagia or odynophagia. • symptoms of gerd that persist or recur despite appropriate therapy. • persistent vomiting of unknown cause. • diseases in which the presence of upper GI pathology may affect planned management, e.g. Decision to anticoagulate. • confirmation of radiological abnormalities. • suspected neoplasia. • assessment and treatment of GI bleeding (acute or chronic). • sampling of tissue or fluid. • to document or treat esophageal varices. • surveillance for malignancy in high risk groups, e.g. Barrett's esophagus, hereditary gastric cancer families. • follow-up of gastric ulcer. • follow-up of patients who undergo endoscopic mucosal resection (emr) or endoscopic submucosal dissection (esd) of an early cancer.