Constant acid refulux for 3 years , stomach/navel burning , chest pain and loss of appetite and stool streaking with blood. possible stomach ulcer?

Possible: See a doctor soon. Seeing red blood on your stool usually means 2 possible things: it is coming from a stomach or small intestine rapidly bleeding ulcer, or it is coming from a lower source like a hemorrhoid (if you're constipated this is likely it). Rarer inflammatory causes exist too. If you've had acid for many years you are at risk for an ulcer, you should be taking an acid-blocking medicine.