Most likely your symptoms are because of Gatro esophageal reflux disease (GERD),It is a chronic digestive disease. GERD occurs when stomach acid or, occasionally, stomach content, flows back into your food pipe . The backwash irritates the lining of your esophagus and causes, heart burn,chest pain
and intense burning sensation in throat.Both acid reflux
and heart burn are a part of GERD.The presence of gastritis has proved additive to your symptoms.
Ask your gastroenterologist to increase the dose of pantroprazole or esomeprazole