The chest pain I have experienced feels like there is a big one clamping down in my esophagus/stomach, burying it's head deeper, trying to burrow away from the medicine. It is like an intense jabbing pinching sensation that lingers, sometimes for hours. Sometimes I get the sensation high in my chest, near the collar bones, other times I feel it low, near my stomach. And one time the pain moved. I had pain in my stomach/lower esophagus for a while, and all of a sudden it moved over. It took about 2 seconds for it to move from the center of my chest/stomach area, over to the left side of my body, and settle into an area that felt like the bottom of my left lung. A couple hours later the pain subsided.