Does anyone have broken heart syndrome with a cough and is on oxygen?

I don’t know what to do tethered to this tank so I can breathe. I had pneumonia and a stressed heart in January and I seem to fluctuate between feeling OK and then cratering.
My coughing from blood pressure pills is chronic and I’m so short of breath I’m frantic.
My doctor says it’s broken heart syndrome and it will take time to heal but I want to go back to yoga and drive my car soonest.
How do I make this better?