Join the club, I get out of breath going up stairs sometimes, yet touch wood, I have been mostly ok when riding
I get sensations like my whole ribs are being squeezed, and my ribs are often sore and aching
Thought my time was up a few months ago when I had to carry my luggage bag up some stairs at the train station
Been to the docs a few times with it, he seems unconcerned
Had heart tests about a year ago
I too feel at my wits end, been searching for answers for over a year now