Burning pain in upper right of stomach and in lower stomach that comes and goes and I belch more. What could this be?

Gall bladder . A thirties female with intermittent right upper abdominal discomfort and belching might be having gall bladder dysfunction. Strict avoidance of fatty and fried foods might ameliorate these symptoms and help to confirm the cause. A doctor can use certain imaging studies like ultrasound to determine the diagnosis.