I have had a constant stomach ache now for over a week. It's not low in my stomach, like in the bowels, but right underneath my rib cage in the middle. Just a constant dull ache, not sharp pains. It gets worse after eating also. I have been taking prilosec now for three days, yet it has not gone away. I don't know if it is heartburn, I don't know what it feels like. Yesterday afternoon it felt like it might be going away, then I drank some coffee

and now it's back with no signs of going away. Does it sound anything like an ulcer, heartburn, H. Pylori, or anything else?