It sounds to me like the lining of your stomach is damaged (
gastritis).
And you made the #1 mistake, you started feeling better
and stopped taking the meds. More often than not you would be on omerprazole at least a month, just because you start feeling better doesnt mean you are better, it means you are STARTING to heal.
Another thing to do is to not eat or drink things that irritate the stomach. Thigns like dairy, gluten, coffee, tea, tomato, garlic, onions, greasy foods, fatty foods.