Hi BB and welcome back!
Although I am sorry to hear that it us due to this symptom and fear.:(
It sounds like you are certainly still dealing with anxiety and the symptoms of the tight chest, rapid HR and breathing issues support that...
The ear issue however, could be something worth checking out with an allergist or ENT. Congestion/inflamation can cause this phenomenon of hearing your pulse...
Follow up with your upcoming appointment certainly...but if all checks out well, then concentrate your efforts on furthering your anxiety management. Can you look into therapy (revisiting?) or a new self-help approach? We have some new material in our Resources since you've been around.:)
Here is a great link explaining the anxiety=phsyical symptom=more anxiety cycle.
Health Anxiety- The Super Scanner
http://www.get.gg/docs/SuperScanner.pdf
I hope you find the answers and help you need soon...keep us posted!
S.C.