Thanks for your query.
Noted your history of daily heartburn for last 5 years and taking OTC. You have coughed up dark blood as well as seen in the picture.
First of all let us make it sure whether the blood has come from the coughing or vomiting.
I would advise you the following:
Upper GI Endoscopy.
CT scan of the chest
ENT opinion for bleeding.
Care under Gastroenterologist.
Hope this helps.
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