I had the Flu almost two weeks ago on the 17, symptoms full blown until the 18 at night. I woke up feeling "better" but had this chest discomfort making me think I had chest congestion. I had this pressure on my chest for about 5 days and it finally went away just a bit not I have been feeling this burning feeling on my upper mid back and have no idea what it is or how I got it. Breathing is fine, it doesn't hurt when I walk or sit. It feels better when I lay down though. I also have cold like symptoms like runny nose, sneezing, a bit of a sore throat. What is going on? It is freaking me out