I have had a bad pain in my left back side for a week, and severe nausea, some vomiting my stomach in the front also hurts.also have a sore throat feels deep down. If i sit perfectly still i feel half way normal but any movement makes me very nauseous. When i drink alot of something cold at once i can feel it in my back where i feel my pain. Could this be an ulcer? Why can I feel the cold liquid in my back?