I started having pain in my chest, upper left side near my shoulder, last night before bed. It was difficult to take a deep breath. When I did, I experienced very sharp pain. It got worse through the night, and laying down made it worse. I thought it might be gas, so I drank a 7-up and took a Phasym for gas. No change. It hasn t gone away today, but the symptoms lessoned during the day. It seems to be getting worse again as I prepare for bed. I now feel it in my shoulder and neck, as well. Especially when I take a deep breath. I live in the country. I am a 49 year old male in pretty good shape. (5.5 & 130 lbs.). No history of high blood pressure. Never smoked. Do not drink. Never any drugs. Your advice would be appreciated.