Hi, Recently, I ve been having strong neck pains. Now that pain is slowly going to my left arm, very achy. The past few days I ve noticed that my left upper chest is tightening up. The tightening/numbing sensation goes all the way up to the left side of my neck. I was recently diagnosed with anxiety. Am I just having a panic attack or is this really something I should be worried about? Theres no pain, just tightening. Especially if I lay down, the tightening gets worse. Please do tell me whats going on!