After lying down briefly I began having trouble breathing as if my neck was too fat or swollen (hard to describe). I have a pain in my left shoulder blade, heaviness in my chest, pain in the left chest when I turn my head to the right and I just feel as if I cannot get a good breath. It also hurts when I take in a deep breath. I have had costochondritis in the past but this feels different. Do these symptoms sound like that as well?