On Sunday I began having dull pain in the top of my right shoulder where my neck and shoulder connect, it only hurt when I breathe in. Yesterday the pain began moving towards my chest and today it is in my chest. The pain is fine when I walk around, but if I lie down it hurts very badly and is hard to breathe. It hurts whenever I breathe deeply as well. Holding my breath seems to subside the pain when I lie down.