Hi Donna,
I have some breathing issues that concerned me. A few test were done and some results. I was diagx with adult onset asthma, they did a pulmanary push test of some kind. Introduced things that could produce symptoms. I only made it ti the second round and had severe reactions, coughing, shortness of breath.

Exersize can induce symptoms too. running up the steps, taking two flights of steps.

Because of the heart murmur and my complaint of a racing heart I wore a haltor heart monitor. It did show correspondance to symptoms and heart racing. I was diagx with anxiety and panic disorder.
same reaction as the excersized induced symptoms of asthma.

I hope that your health improves and they have answers for your symptoms and concerns. It is very fretful to be told of potential heart problems.

It is good to have supportive friends even if they are friends wthout faces on the forum. They are great here and have helped me sooooo much.
Hugs and feel better,
Dianne