Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain the symptoms that you are experiencing are classical signs of Gastro-esophageal reflux disease commonly known as Acid reflux and does not look like stomach cancer.. An endoscopy is the best way to confirm the cause and if acid reflux is confirmed you will have to take proton pump inhibitors that you are already taking and H2 blockers like Ranitidine, famotidine, antacids like milk of magnesia or calcium carbonate has to be taken half an hour before meals.. You food should be low spiced, and acid acidic foods too. Take more of yoghurt as it is a Probiotic.. Drink plenty of water.. Take small portions of food every 2 hours.. Take short walk after meals.. Finish your dinner atleast 2 hours before sleeping and take short walk after meals.. Do regular moderate workout.. Loose weight if you are obese. Sleep with head and chest slightly raised as compared to feet to prevent acid to flow upwards. If you sleep laterally recline in left lateral position.. Hope this information helps.. Thanks and regards. Dr. Honey Nandwani Arora.