Thanks for your query . you might be having acid reflux disease along with gastritis .which needs a upper GI endoscopy after a GI dr consult . you can try some lifestyle and diet changes like not skipping meals cutting diary products avoid eating outside .No processed foods . no smoking , no alcohol no soft drinks Reduce oily and spicy food Eat a high fibre plant based diet. keep moving your bowels sleep well for 8 hours reduce stress all these things will help you. the final treatment depends on the endoscopy results . hope this was helpful