I take Atenenol 25 - 100mg, whenh I need it which at the moment is like every day. It seems to realx my chest a little and helps the shortness of breath. My symptoms feel so acute, it really feels like I'm on the verge of a heart attack but I guess you've had all the tests and you still feel that there's something wrong with your heart so maybe we just don't want to believe it's anxiety.
Still don't feel acutely anxious with the symptoms (then again I've just moved to a new country???)
All the best - hope we can laugh at this some day - our current symptoms just don't make any sense.