For the past few days I have been experiencing very strange indigestion. Every time I eat I it feels strange and I can almost immediately feel the acid coming up my throat. When I lay down, I feel it. It also feels like there is something heavy on my chest, and even when I drink water it feels strange. I am burping violently, waking up in the middle of the night, and generally just feeling awful. I have less of an appetite than normal, and it feels sort of hard to breath.