<human>: Can you condense the text into a few key points?

Let me preface this by saying I have a doctor's appointment set up for next week. Just wondering if anyone else has had similar issues?

A little background: about a year ago I had my first panic attack. Ended up in the ER thinking it was a heart attack. Wore a heart monitor for 24 hours and was given the all clear. I haven't had a bad panic attack since April and my anxiety has been uber low for the past month or so. 

Recently, I got a cough as part of a cold. Ever since then, it has felt like there is a pressure in the middle of my chest. In addition, I've had this sensation like someone is squeezing the air out of my lungs like they are a balloon. At the same time it feels like my throat is getting choked. Like someone is pressing where my neck meets my clavicle. I've noticed it gets worse when I move around (I usually take a three mile walk each day and it is really noticeable about 10min after I stop walking). Needless to say this freaked me out and has given me panic attacks like no one's business. The only things I've found that help my chest and breathing: an ice pack on my chest, a warm shower and puffing my chest out for a few seconds. Any ideas?
<bot>: I have chest pressure, a cough and the sensation of being out of breath after coming down with a cold a few weeks ago. Had heart tested and was given the all clear a few months ago. Any ideas?