Hi, I have a pain in my sternum. (middle of my chest). It burns and feels like it is bubbling, making the back of my throat watery like I need to throw up. It feels like there is something stuck, but I know there isn t anything. It comes in waves, like every 15 secs. This has happened a few times within the last few weeks. Could this be acid reflux or indigestion? What should I do? Thank you, Melena