Ok. So I started developing this pain on my left side shoulder blade, middle of back area. It has gotten worse as the day goes on. Of course I freaked out, thought I could be having a heart attack, thought my left arm was starting to hurt, then I thought I could have pnuemonia, then I thought maybe my lung collapsed. I freaked out of couse, and was about to have my husband take me to urgent care. I called my best friend and she talked me down, I took a xanax, and started to relax. I didn't end up going to the urgent care and I am really proud of myself for that. But here I am with this back pain, which is real, and I have no idea what it could be. I am trying not to think the worst. Trying really really hard!!!!! It hurts when I take a deep breath in and when I move around. If I sit really still it doesn't hurt. Does anyone have any clue as to what this could be??? I had been posting on here before of this mystery pain (kayteecatt knows what I'm talking about) and I wonder if this could be another part of costochondritis? I have been dx'd with fibromyalgia by a rheumatologist but I have not been dx'd with costochondritis. I think that I have it though, I know the value of me thinking that is nill because I am a hypochondriac but I really think I have it. What do you all think?