I am a 36 yearold slighty over weight woman I have been having a lot of pressure on my chest off and on since I had a c-section but since 3 days ago it won't go away now. Feels like someone sitting on my chest it gets worse when laying flat on my back or on my sides. Went swimming in the pool and noticed while in the water up to my chest pressure is worse same when I pick my baby up. went to the emergency room had a ekg and a xray and cbc do all comes back normal so the gave me antiboictics for Bronchitis. I really don't think it is that I have a history of asthma but my oxygen levels are normal. Any Ideas its quit a scary feeling.