First and foremost, do not think/worry about the possible complications!
From the details you have given, it sounds like a case of gastritis
(let us start from the most common/minor complication). How is your appetite and bowel movements? What about your food habits? Do you skip your meals? Do you have constipation? Do you eat a lot of potatoes, junk food and meat?
Please try to have food on time and include a lot of fruits, vegetables and water (liquid) in your diet. Avoid food like potatoes/eggs that can make you gaseous. As a simple remedy, boil 1 tsp of cumin seeds in about 150 ml of water, allow it to cool and drink it after your meals-atleast twice daily. Do it for a month. I am sure it will cure your problem . If further problem persists, consult a doctor.